|
A Partial list of Publications
& Patents
Patrick Mewton & John Leffingwell,
Vertically
Assessing Value-Added Ingredients in the F&F
Industry, Perfumer &
Flavorist, Vol. 43, pp. 34-43, January, 2018. (This link
takes you to a web version, not the magazine
article).
Patrick Mewton & John Leffingwell,
Diversifying
Flavor & Fragrance Growth,
Perfumer & Flavorist, Vol. 42, pp. 26-30, May, 2017.
(This link takes you to a web version, not the magazine
article).
John C. Leffingwell, (-)-Rotundone,
an Important Odor Active Constituent of Agarwood (Oud),
is now FEMA GRAS,
Leffingwell Reports, Vol. 8, (No. 1) 1-3,
January 2017
Elena I. Savelieva, Liudmila K.
Gustyleva, Elizaveta D. Kessenikh, Natalya S.
Khlebnikova, John Leffingwell, Olga P. Gavrilova, and
Tatiana Yu. Gagkaeva, Study
of the Vapor Phase Over Fusarium Fungi Cultured on
Various Substrates, Chemistry
& Biodiversity, Vol. 13, (No. 7), 891-903, July 2016.
doi: 10.1002/cbdv.201500284
John Leffingwell & Diane
Leffingwell, Flavours
& fragrances: Recent advances in
biotechnology, Speciality
Chemicals Magazine, Vol. 35 (No. 5), pp. 32-34, May
2015
John C. Leffingwell, E.D. Alford,
Diane Leffingwell - Volatile
Constituents of Commercial Canned Pumpkin Puree (ex
Cucurbita moschata) by Dynamic Headspace
Analysis, Leffingwell Reports,
Vol. 7 (No. 3), 1-6, March 2015
John Leffingwell & Diane
Leffingwell, Biotechnology
- Conquests and Challenges in Flavors &
Fragrances, Leffingwell
Reports, Vol. 7 (No. 2), 1-1, March 2015
John C. Leffingwell, E.D. Alford,
Diane Leffingwell - Identification
of the Volatile Constituents of Raw Pumpkin (Cucurbita
pepo L.) by Dynamic Headspace
Analyses, Leffingwell Reports,
Vol. 7 (No. 1), 1-14, January 2015
John C. Leffingwell, Chemoreception
& Tobacco (Powerpoint
Presentation to Centers for Disease Control and
Prevention, Atlanta, GA), October 6, 2014 (or as a pdf
file at CDC-Presentation
(1).pdf )
John C. Leffingwell, Oxidative
Coupling of Aldehydes & Imines III. An Entry to the
Synthesis of Highly Substituted
Pyrrolidines, Leffingwell
Reports, Vol. 6 (No. 3), 1-12, July 2014
John C. Leffingwell, Oxidative
Coupling of Aldehydes & Imines II. An Entry to the
Synthesis of Tropane Alkaloid Analogs (di &
triazabicyclo[3.2.1]octan-3-ones) by Dipolar
Additions, Leffingwell
Reports, Vol. 6 (No. 2), 1-9, July 2014
John C. Leffingwell, Oxidative
Coupling of Aldehydes & Imines I. An Entry to the
Synthesis of 6,6,7,7-Tetraalkyl Tropane Alkaloid
Analogs, Leffingwell Reports,
Vol 6. (No 1), 1-18, June 2014
John C. Leffingwell & David G.
Rowsell, Wilkinson
Sword Cooling Compounds: From the Beginning to Now,
Perfumer & Flavorist, Vol.
39, No. 3, 34-43, 2014
John Leffingwell & Diane
Leffingwell, Flavor
Properties of FEMA GRAS List 26 Flavor
Chemicals, Perfumer &
Flavorist, Vol. 39, No. 1, 26-37: 2014
John C. Leffingwell, E.D. Alford,
Diane Leffingwell & Roger Penn, Identification
of the Volatile Constituents of Cyprian Latakia Tobacco
by Dynamic and Static Headspace
Analyses, Leffingwell Reports,
Vol. 5(2), November 2013,1-29
John C. Leffingwell, E.D. Alford &
Diane Leffingwell, Aroma
Constituents of a Supercritical CO2 Extract of Kentucky
Dark Fire-Cured Tobacco,
Leffingwell Reports, Vol. 5(1), July 2013
John Leffingwell, Flavor
Properties of FEMA GRAS List 25 Flavor
Chemicals, Perfumer &
Flavorist, Vol 36, June 2011, pp. 24-31
John C. & Diane Leffingwell,
Chiral
chemistry in flavours &
fragrances,
Speciality Chemicals Magazine, March 2011, pp.
30-33
John C. Leffingwell & E.D. Alford,
Volatile
Constituents of the Giant Puffball Mushroom (Calvatia
gigantea), Leffingwell
Reports, Vol. 4, March 2011
John C. Leffingwell, Cooling
Ingredients and Their Mechanism of Action, in
Handbook
of Cosmetic Science and Technology, Third
edition, André O.
Barel, Marc Paye, and Howard I. Maibach, Editors, Pub:
Informa Healthcare: New York. Chapter 65, pp. 661-675
(2009.)
Ashok K. Moza, Hong Sun, Stephen
Rohde, Diane Leffingwell & John Charles Leffingwell,
Cooling compositions, United
States Patent Application 20080293821 A1 (Nov.27,
2008)
Ashok K. Moza, Stephen E. Rohde, John
C. Lefingwell & Diane Leffingwell, Use of a liquid
cooling sensate to provide a pungent, warming or tingling
sensate composition, United
States Patent Application No. 2008/0038386 A1 (Feb. 14,
2008)
Ashok K. Moza, Stephen E. Rohde, John
C. Lefingwell & Diane Leffingwell, Cooling agents as
flavor and saltiness enhancers, U.S.
Patent Application No. 2007/0059417 A1 (March
15,2007)
Ashok K. Moza, Hong Sun, John C.
Leffingwell, Diane Leflingwell & Stephen Rohde,
Liquid composition of
2-Isopropyl-N,2,3-trimethylbutyramide and
N-Ethyl-p-menthane-3-carboxamide, its preparation method
and its applications as a cooling agent and flavor
enhancer, U.S.
Patent Application No. 2007/0048424 A1 (March 1,
2007)
John C. Leffingwell, Chirality
and odor perception: Scents of precious woods, Supplement
to Chimica Oggi/CHEMISTRY TODAY
Vol 24, No. 4, Chiral technologies, 36-38
(2006)
John C. Leffingwell1 and E. D. Alford,
Volatile
Constituents of Perique
Tobacco, Electronic Journal of
Environmental, Agricultural and Food Chemistry, 4(2),
2005. March - April Issue.
John C. Leffingwell, Reflections
on a Half Century of Flavor
Chemistry (Society of Flavor
Chemists 50th Anniversary Flavor Symposium), October 7,
2004
John C. Leffingwell, The
Art & Science of Fragrance & Flavor
Creation (Presentation to The
Society of Flavor Chemists), December 4, 2003
Leffingwell, J. C., Chirality
& Bioactivity I.: Pharmacology, Leffingwell Reports,
Vol. 3 (No. 1), May 2003
Leffingwell, J., Olfaction
(Sense of Smell), Cosmetics & Medicine (Moscow), No.
3, 24-33 (2002) in Russian (
translated by Sergey Andreev) - For the English version
preprint see http://www.leffingwell.com/download/Olfaction5.pdf
Leffingwell, J., Olfaction
(Sense of Smell), Part 2, Cosmetics & Medicine
(Moscow), No. 4, 6-13 (2002)
in Russian ( translated by Sergey Andreev) - For the
English version preprint see http://www.leffingwell.com/download/Olfaction5.pdf
Leffingwell, J. C., Saffron
- Aroma from Carotenoids, Leffingwell Reports, Vol. 2,
(No. 5) October 2002
Leffingwell, J. C., Carotenoids
as Flavor & Fragrance Precursors , Leffingwell
Reports, Vol. 2, (No. 3) October 2002
Leffingwell, J. C., Boronia
- Aroma from Carotenoids, Leffingwell Reports, Vol. 2,
(No. 4) October 2002
Leffingwell, J. C., Osmanthus,
Leffingwell Reports, Vol. 2, (No. 2) October
2002
Leffingwell, J. C., Tobacco
- Aroma from Carotenoids, Leffingwell Reports, Vol. 2,
(No. 6) October 2002
Leffingwell, J. C., Olfaction
- V, Leffingwell Reports, Vol. 2, (No. 1) May
2002
Leffingwell, J. C., Rose
(Rosa damascena) - a part of our series on aroma
materials produced by carotenoid degradation.,
Leffingwell Reports, Vol. 1, (No. 3) February,
2001
Leffingwell, J. C., Olfaction
- A Review, Leffingwell Reports, Vol. 1, (No.1) February,
2001
Leffingwell, J. C., Olfaction
- II, Leffingwell Reports, Vol. 1, (No. 4) September,
2001
Leffingwell, J.C., Leaf
chemistry: Basic chemical constituents of tobacco leaf
and differences among tobacco types, in Tobacco -
Production, Chemistry and Technology, D.L. Davis and M.T.
Nielsen, Editors, CORESTA, Blackwell Science, Ltd, London
(1999), pp. 265-284.
Leffingwell, John C. and Diane
Leffingwell, GRAS
Flavor Chemicals-Detection Thresholds, Perfumer &
Flavorist, 16(1), 1-19 (1991)
Leffingwell, John C. and Diane
Leffingwell, Chemical
and sensory aspects of tobacco flavor, Rec. Adv. Tob.
Sci., 14, 169-218 (1988)
Schiffman S. S., Leffingwell J. C.,
Perception
of odors of simple pyrazines by young and elderly
subjects: a multidimensional analysis., Pharmacol Biochem
Behav., (6):787-98 ( 1981)
Harllee, G.C. & J.C. Leffingwell,
Casing
Materials - Cocoa (Part II), Tobacco International 181
(No. 6) March 23, 1979 pp. 18-43
Harllee, G.C. & J.C. Leffingwell,
Casing
Materials - Cocoa (Part I), Tobacco International 181
(No. 5) March 9, 1979 pp. 40-52
Leffingwell, J. C., Nitrogen
components of leaf and their relationship to smoking
quality and aroma, Rec. Adv. Tob. Sci., 2, 1-31
(1976)
Leffingwell, J.C. & R.E.
Shackelford, Laevo-Menthol
- Syntheses and organoleptic properties, Cosmetics and
Perfumery, 89(6), 69-89, 1974
Leffingwell, J. C., et. al.,
Clary
Sage Production in the Southeastern United States,
International Congress of Essential Oils, San Fransisco,
Sept. 1974
Leffingwell, J.C., Alkylation
of bicyclic imines with the Stork-Dowd reagent system, J.
Chem. Soc., Chem. Comm., (1973), pp
299-300
Leffingwell, J.C., Ronad E.
Shackelford ; H. J. Young, A
novel neighboring group participation in the solvolysis
of 3,4-epoxycarene with a carboxylic acid, Synthetic
Communications, 2(2), 105-106 (1972)
Leffingwell, J. C. et al.,
Tobacco
flavoring for Smoking Products, Winston-Salem N.C.
1972
Leffingwell, J. C., Tobacco
flavoring for Smoking Products II. Tobacco Science, Vol.
18, pp 55-57 (1974)
Leffingwell, J.C., A
new procedure for the alkylation of isophorone at the
4-position, Tetrahedron Letters, 1653-1656
(1970)
Leffingwell, J.C., et.al.,
A
novel ring contraction during the vapor phase pyrolysis
of substituted trans-1-hydroxy 2-aetoxycyclohexanes,
Tetrahedron Letters, 2003-2006 (1970)
Leffingwell, J.C., The
oxidative coupling of aliphatic aldehydes, ", J. Chem.
Soc., Chem. Comm., (1970), pp 357-58
Leffingwell, J.C., et al,
"A
New Synthetic Method for the Preparation of Aromatic
Aldehydes, Ketones, and Schiff Bases", J. Chem. Soc.,
Chem. Comm., (1969), pp 1151-1152
E. Royals & Leffingwell, J.C.,
Reactions
of the Limonene 1,2-Oxides, J. Org. Chem., 31(6), 1937-44
(1966)
Leffingwell, J.C. & E.E. Royals,
Conformational
aspects in the opening of cis/trans 1,4-dialkyl
substituted 1,2-cyclohexene epoxides with acetic acid,
Tetrahedron Letters, 3829-3837
(1965).
E. E. Royals & Leffingwell, J.C.,
Structure
of Ethyl dehydroacetate, J. Org. Chem., 30(4), 1255-56
(1965)
E. E. Royals & Leffingwell, J.C.,
The
absolute configurations of the carvomenthols, J. Am.
Chem. Soc, 10, 2067-68 (1964)
Leffingwell, J.C. & E. Royals,
alpha-Pinene
Oxide Reaction with Acetic Acid, J. Org. Chem., 29(7),
2098-2099 (1964)
Leffingwell, J.C., The
Mechanism of Formation of
Pinol, Msc. Thesis, Emory
University, 1962, Department of Chemistry
Leffingwell, J.C., A
Study of Some Terpene Oxides: Conformational Effects in
Substituted Cyclohexene
Oxides, PhD Thesis, Emory
University, 1963, Department of Chemistry
J.C. Leffingwell, Verfahren
zur Herstellung dimerer Imine, Swiss Patent No. 540,885
(October 15, 1973).
J.C. Leffingwell, Rauchwarenprodukt,
Swiss Patent No. 540,654 (October 15,
1973).
J.C. Leffingwell, Verfahren
zur Herstellung dimerer Imine aus monomeren Imenen, Swiss
Patent No. 540,884 (October 15,
1973).
J.C. Leffingwell & R.E.
Shackelford, Verfahren
zur Herstellung von im Cyclopentylring substituierten
Alkylcyclopentylketonen, Swiss Patent No. 537,351 (July
13, 1973)
J.C. Leffingwell, Verfahren
zur Herstellung von Aldehyde-Kupplungs-producten, Swiss
Patent No. 540,870 (October 15, 1973).
J.C. Leffingwell, Tobacco
Product, US Patent No. 3,746,010 (Jul 17,
1973)
J.C. Leffingwell, Process
for the Preparation of Dimeric Amines and Pyrroles , US
Patent No. 3,709,890 (Jan. 9, 1973)
J.C. Leffingwell, Verfahren
zur Herstellung von Aldehyde- oder
KetonKupplungsproducten, Swiss Patent No. 527,782
(October 31, 1972).
J.C. Leffingwell, Verfahren
zur Herstellung von Pyrolen, German Patent No. 1,795,618
(April 6, 1972)
J.C. Leffingwell, Preparation
of a Terpene Alcohol , US Patent No. 3,676,504 (July 11,
1972)
J.C. Leffingwell, Treatment
of 2-Substituted Aldehydes with Lead Dioxide, US Patent
No. 3,658,849 (April 25, 1972)
J.C. Leffingwell & R.E.
Shackelford, Verfahren
zur Herstellung von 1-Mentheneepoxyd, Swiss Patent No.
519,494 (April 14, 1972).
J.C. Leffingwell & R.E.
Shackelford, SYNTHESIS
OF ALKYL CYCLOPENTYL KETONES, US Patent
No. 3,689,562 (Sept. 5, 1972)
J.C. Leffingwell, ISOPHORONE
DERIVATIVES HAVING A NITRILE-CONTAINING SUBSTITUENT IN
THE 4-POSITION, US Patent No. 3,655,720
(April 11, 1972)
J.C. Leffingwell, Verfahren
zur Herstellung von Imin- oder Pyrrolverbindungen, German
Patent No. 1,668,625 (July 29, 1971)
J.C. Leffingwell, Verfahren
zur Herstellung organischer Verbindungen aus monomeren
Iminen, German Patent No. 1,668,626 (July 29,
1971)
J.C. Leffingwell, Tabakproduct,
German Patent No. 2.019,252 (February 11,
1971)
J.C. Leffingwell & R.E.
Shackelford, Verfahren
zur Herstellung von Alkylcyclopentylketonen, German
Patent No. 2,012,093 (February 25, 1971).
J.C. Leffingwell & R.E.
Shackelford, Preparation
of Ketones, Great Britain Patent No. 1,240,423 (July 21,
1971).
J.C. Leffingwell, Synthesis
of Organic Compounds from Aldehydes, Great Britain Patent
No. 1,246,232 (Sept. 15, 1971).
J.C. Leffingwell, Verfahren
zur Herstellung von Isophornderivaten, German Patent No.
2,004,853 (Jan 7, 1971)
J.C. Leffingwell, Treatment
of Isophorone, Great Britain Patent No. 1,226,730 (Mar
31, 1971).
J.C. Leffingwell, Preparation
of a Terpene Alcohol, US Patent No. 3,609,197 (Sept 28,
1971)
J.C. Leffingwell, Verfahren
zur Herstellung von Terpinen-4-ol, Swiss Patent No.
502,286 (March 15, 1971).
J.C. Leffingwell, Preparation
of Terpinen-4-ol, Great Britain Patent No. 1,223,241
(Feb. 24, 1971)
J.C. Leffingwell, PROCESS
OF COUPLING ALDEHYDES AND KETONES, US
Patent No. 3,609,193 (Sept 28, 1971)
J.C. Leffingwell, PREPARATION
OF MONOMERIC OR DIMERIC IMINES AND
PYRROLES, US Patent No. 3,598,827 (Aug.
10, 1971)
J.C. Leffingwell, Verfahren
zur Herstellung von Dihydrocarvon, Swiss Patent No.
503,681 (April 15, 1971)
J.C. Leffingwell & R.E.
Shackelford, Epoxidation
Process, Great Britain Patent No. 1,219,040 (Jan. 13,
1971)
J.C. Leffingwell & R.E.
Shackelford, Trennung
und Umwandlung von isomeren Cyclohexenderivaten, Swiss
Patent No. 510,006 (Aug. 31, 1971)
J.C. Leffingwell & R.E.
Shackelford, Epoxidation
of 1-Menthene, Great Britain Patent No. 1,226,782 (March
31, 1971)
J.C. Leffingwell, Tobacco
Product, US Patent No. 3,625,224 (Dec. 7,
1971)
J.C. Leffingwell, Process
for Preparing Aldehyde or Ketone Coupling Products, Great
Britain Patent No. 1,209,493 (October 21,
1970)
J.C. Leffingwell, A
Process for Synthesizing Imine or Pyrrole Compounds,
Great Britain Patent No. 1,178,192 (January 21,
1970)
J.C. Leffingwell, A
Process for Synthesizing Organic Compounds from Monomeric
Imines, Great Britain Patent No. 1,177,160 (January 7,
1970)
J.C. Leffingwell & R.E.
Shackelford, Procede
de preparation d'alcoyl cyclopentyl cetones, French
Patent No. 2,037,991 (December 31, 1970).
J.C. Leffingwell, Synthese
van alkylcyclopentyketonen, Netherlands Patent No.
7,003,145 (Sept. 15, 1970)
J.C. Leffingwell, Procede
de preparation 1,4-dioxo-butanes et 1-oxo-3-oxa-pentenes
tetrasubstiues a partir d'aldehydes, French Patent No.
2,035,537 (December 18, 1970).
J.C. Leffingwell, Derives
de l'isophooone, Belgium Patent No. 745,395 (August 3,
1970)
J.C. Leffingwell, Procede
de derives d'isophorone, French Patent No. 2,033,827
(December 4, 1970).
J.C. Leffingwell, Werkwijze
voor het bereiden van isophoronderivaten, Netherlands
Patent No. 7,001,497 (Aug. 5, 1970).
J.C. Leffingwell, Terpinen-4-ol
und Verfahren zu seiner Herstellung, German Patent No.
1,911,724 (March 19, 1970).
J.C. Leffingwell, SYNTHESIS
OF DIHYDROCARVONE, US Patent No.
3,538,164 (Nov 3, 1970)
J.C. Leffingwell, Verfahren
zur Herstellung von Dihydrocarvon, German Patent No.
1,814,025 (Feb. 26, 1970)
J.C. Leffingwell, Procede
de preparation de Dihydrocarvone, French Patent No.
1,594,462 (July 10, 1970)
J.C. Leffingwell, Process
for the Prepation of Dihydrocarvone, Great Britain Patent
No. 1,209,396 (Oct 21, 1970)
J.C. Leffingwell & R.E.
Shackelford, Epoxydation
von 1-Menthen, German Patent No. 1,957,419 (Dec. 23,
1970)
J.C. Leffingwell & R.E.
Shackelford, Procede
d'epoxydation de terpenes, French Patent No. 2,023,262
(Aug. 7, 1970)
J.C. Leffingwell & R.E.
Shackelford, Epoxydering
van 1-menthen, Netherlands Patent No. 6917152 (May 19,
1970)
J.C. Leffingwell & R.E.
Shackelford, Separation
of Isomers of 1,4-Dialkyl- and
1-Alkyl-4-alkenyl-1,2-epoxycyclohexanes, Great Britain
Patent No. 1,201,742 (Aug. 12, 1970)
J.C. Leffingwell & R.E.
Shackelford, Trennung
und Umwandlung von isomeren Cyclohexenderivaten, German
Patent No. 1,908,274 (July 30, 1970)
J.C. Leffingwell & R.E.
Shackelford, Verfahren
zur Herstellung von 1-Mentheneepoxyd, Swiss Patent No.
495,350 (Oct 15, 1970).
J.C. Leffingwell & R.E.
Shackelford, Procede
de preparation d'epoxyde de 1-menthene, French Patent No.
1,591,866 (Aug. 7, 1970)
J.C. Leffingwell, Procede
de preparation du terpinen-4-ol, French Patent No.
2,003,498 (Nov 7, 1969).
J.C. Leffingwell, Werkwijze
voor het bereiden van Dihydrocarvon, Netherlands Patent
No. 6,900,753 (Aug. 12, 1969).
J.C. Leffingwell, PROCESS
FOR MAKING 4,4-DIMETHYL-3-BUTENYL METHYL KETONES,
INTERMEDIATES THEREFOR AND THE SAID
INTERMEDIATES, US Patent No. 3,420,827
(Jan. 7, 1969)
J.C. Leffingwell & R.E.
Shackelford, Procede
de separation d'isomeres de derives d'epoxycyclohexane et
leur transformation ulterieure, French Patent No.
2,002,595 (Oct 31, 1969)
J.C. Leffingwell & R.E.
Shackelford, Scheidingswerkvijze,
Netherlands Patent No. 6,902,885 (Aug 28,
1969)
J.C. Leffingwell & R.E.
Shackelford, Verfahren
zur Herstellung von 1-Mentheneepoxyd, German Patent No.
1,807,324 (Aug 14, 1969).
J.C. Leffingwell, Werkwijze
ter bereiden van 1-menthenepoxyde, Netherlands Patent No.
6,818,299 (June 30, 1969).
J.C. Leffingwell, Procede
de Preparation d'imines et de pyrolles, Belgium Patent
No. 706726 (May 17, 1968)
J.C. Leffingwell, Werkwijze
voor het van imine- of pyrroolverbindigen, Netherlands
Patent No. 6,715,508 (May 20, 1968)
J.C. Leffingwell, Procede
de Preparation d'imines dimeres et de pyrolles par
oxidation d'imines monomeres, Belgium Patent No. 706725
(May 17, 1968)
J.C. Leffingwell, Werkwijze
voor het bereiden van imineverbindingen, Netherlands
Patent No. 6,715,507 (May 20, 1968)
J.C. Leffingwell, Werkwijze
voor het bereiden van terpinen 4-ol, Netherlands Patent
No. 6,903,499 (Sept. 10, 1968).
J.C. Leffingwell, SYNTHESIS
OF ALKYL CYCLOPENTYL KETONES, Canadian
Patent No. 895916 (March 21, 1972)
J.C. Leffingwell, TREATMENT
OF ISOPHORONE, Canadian Patent No. 895899
(March 21, 1972)
J.C. Leffingwell, SYNTHESIS
OF ORGANIC COMPOUNDS FROM ALDEHYDES,
Canadian Patent No. 879111 (August 24,
1971)
J.C. Leffingwell, SYNTHESIS
OF DIHYDROCARVONE, Canadian Patent No.
866218 (March 16, 1971)
J.C. Leffingwell, SYNTHESIS
OF ORGANIC COMPOUNDS FROM ALDEHYDES AND
KETONES, Canadian Patent No. 866199
(March 16, 1971)
J.C. Leffingwell, TREATMENT
OF 1,4-DIALKYL-1,2-EPOXYCYCLOHEXANES,
Canadian Patent No. 863968 (February 16,
1971)
J.C. Leffingwell & R.E.
Shackelford, EPOXIDATION
PROCESS, Canadian Patent No. 854722
(October 27, 1970)
J.C. Leffingwell & R.E.
Shackelford, EPOXIDATION
PROCESS, Canadian Patent No. 854226
(October 20, 1970)
J.C. Leffingwell, IMINE
AND PYRROLE SYNTHESIS, Canadian Patent
No. 849546 (August 18, 1970)
J.C. Leffingwell, PROCESS
FOR PREPARING TERPINENE-4-OL, Canadian
Patent No. 844002 (June 9, 1970)
J.C. Leffingwell, OXIDATIVE
DIMERIZATION OF IMINES, Canadian Patent
No. 820902 (August 19, 1969)
J.C. Leffingwell, DERIVES
DE L'ISOPHORONE, Belgium Patent No.
745395 (August 3, 1970)
J.C. Leffingwell, Verfahren
zur Herstellung von Isophoronderivaten, German Patent No.
2004853 (January 7, 1971)
Web
Articles by J.C. Leffingwell (1999-)
1. Chirality & Odour Perception at
http://www.leffingwell.com/chirality/chirality.htm
2. Flavor & Fragrance Industry
Leaders at http://www.leffingwell.com/top_10.htm
3. Odor Detection Thresholds of GRAS
Flavor Chemicals at http://www.leffingwell.com/odorback.htm
4. LYCOPENE - The Ultimate
Phytochemical Nutraceutical? at http://www.leffingwell.com/lycopene.htm
5. Carotenoids as Flavor &
Fragrance Precursors at http://www.leffingwell.com/caroten.htm
6. Boronia - Aromas from Carotenoids
at http://www.leffingwell.com/boronia.htm
7. Saffron - Aromas from Carotenoids
at http://www.leffingwell.com/saffron.htm
8. Rose (Rosa damascena) - Aromas from
Carotenoids at http://www.leffingwell.com/rose.htm
9. Osmanthus - Aromas from Carotenoids
at http://www.leffingwell.com/osmanthus.htm
10. Tobacco - Aromas from Carotenoids
at http://www.leffingwell.com/tob.htm
11. Carotenoids in Light Harvesting
Complexes at http://www.leffingwell.com/lhc.htm
12. Menthol Enantiomers - Organoleptic
Properties at http://www.leffingwell.com/menthol1/menthol1.htm
13. Cool without Menthol & Cooler
than Menthol at http://www.leffingwell.com/cooler_than_menthol.htm
14. Aldehydes - GRAS: Odor Properties
and Molecular Visualization at http://www.leffingwell.com/ald.htm
15. Alkenols: Odor Properties and
Molecular Visualization at http://www.leffingwell.com/burnt.htm
16. Burnt Sugar Notes: Odor Properties
and Molecular Visualization at http://www.leffingwell.com/dlacton.htm
17. delta-Lactones - GRAS: Odor
Properties and Molecular Visualization at
http://www.leffingwell.com/dlacton.htm
18. Esters - GRAS: Odor Properties and
Molecular Visualization at http://www.leffingwell.com/esters.htm
19. gamma-Lactones - GRAS: Odor
Properties and Molecular Visualization at
http://www.leffingwell.com/glacton.htm
20. Pyrazines - GRAS: Odor Properties
and Molecular Visualization at http://www.leffingwell.com/pyrazine.htm
21. GC-MS analysis of hardwood smoke
flavor at http://www.leffingwell.com/smoke.htm
22. GC-MS analysis of Dark Fire-cured
Tobacco at http://www.leffingwell.com/firecured.htm
23. Synthesis of (-)-Menthol from
(+)-Citronellal at http://www.leffingwell.com/menthol2/menthol2.htm
25. Synthesis of (-)-Menthol from
(+)-Pulegone at http://www.leffingwell.com/menthol3/menthol3.htm
26. Synthesis of (-)-Menthol from
(-)-Piperitone at http://www.leffingwell.com/menthol4/menthol4.htm
27. SCM-GLIDCO (-)-Menthol Synthesis
from (-)-beta-Phellandrene at http://www.leffingwell.com/menthol5/menthol5.htm
28. (-)-Menthol Synthesis from
(-)-delta-3-Carene at http://www.leffingwell.com/menthol6/menthol6.htm
29. (-)-Menthol Synthesis from
(+)-Limonene at http://www.leffingwell.com/menthol7/menthol7.htm
30. (-)-Menthol Synthesis from
(-)-beta-Pinene at http://www.leffingwell.com/menthol8/menthol8.htm
31. H&R (-)-Menthol Synthesis from
m-Cresol / Thymol at http://www.leffingwell.com/menthol9/menthol9.htm
32. Takasago (-)-Menthol Synthesis
from Myrcene at http://www.leffingwell.com/menthol10/menthol10.htm
33. (-)-Menthol via Lipase Resolution
at http://www.leffingwell.com/menthol10/menthol11.htm
34. (-)-Menthol from Mesityl oxide via
Piperitenone at http://www.leffingwell.com/menthol10/menthol12.htm
35. Olfaction at http://www.leffingwell.com/olfaction.htm
Note - www.leffingwell.com has been
honored as the Chemweb.com - Alchemist webpick (May 1999)
and Science magazines Netwatch webpick (October
2000)
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