Ching Hwa Tseng

age ~77

from Henderson, NV

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Ching Tseng Phones & Addresses

Flavoring Compositions Containing Alkyl Esters Of 2-Methyl-4-Pentenoic Acid
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US Patent:

39768015, Aug 24, 1976
Filed:

Apr 8, 1975
Appl. No.:

5/566117
Inventors:

John B. Hall - Rumson NJ
Ching Y. Tseng - Middletown NJ
Manfred Hugo Vock - Locust NJ
Joaquin Vinals - Red Bank NJ
Edward J. Shuster - Brooklyn NY
Assignee:

International Flavors & Fragrances Inc. - New York NY
International Classification:

A23L 1235
US Classification:

426534
Abstract:

Methods are described for adding 2-methyl-4-pentenoic acid and/or C. sub. 2 -C. sub. 6 alkyl esters thereof to foodstuffs, chewing gums or medicinal products in order to impart sweet, fruity, strawberry, winey-cognac, pineapple-like, pear, green and/or apple-like aromas and tastes; with cooked strawberry jam undertones to said foodstuffs, chewing gums or medicinal products.

Novel Process For Altering The Organoleptic Properties Of Tobacco Using 2-Methyl-4-Pentenoic Acid And The Ethyl Esters Thereof
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US Patent:

39878031, Oct 26, 1976
Filed:

Apr 21, 1975
Appl. No.:

5/569854
Inventors:

John B. Hall - Rumson NJ
Ching Y. Tseng - Middletown NJ
Manfred Hugo Vock - Locust NJ
Joaquin Vinals - Red Bank NJ
Edward J. Shuster - Brooklyn NY
Assignee:

International Flavors & Fragrances Inc. - New York NY
International Classification:

A24B 312
US Classification:

131 17R
Abstract:

Described is a process comprising adding to tobacco (for subsequent incorporation into smoking articles along with tobacco blend) an amount sufficient to alter the flavor or aroma of the tobacco of 2-methyl-4-pentenoic acid and/or ethyl-2-methyl-4-pentenoate.

Flavoring With Cis Esters Of 2-Methyl-3-Pentenoic Acid
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US Patent:

40003272, Dec 28, 1976
Filed:

May 9, 1975
Appl. No.:

5/576240
Inventors:

Ching Y. Tseng - Middletown NJ
John B. Hall - Rumson NJ
Manfred Hugo Vock - Locust NJ
Joaquin Vinals - Red Bank NJ
Edward J. Shuster - Brooklyn NY
Assignee:

International Flavors & Fragrances Inc. - New York NY
International Classification:

A23L 1235
US Classification:

426534
Abstract:

Described is the use in berry fruit flavors of a synthetically-produced 6-carbon carboxylic acid ester-containing composition comprising as its major constituent a cis ester of 2-methyl-3-pentenoic acid having the structure: ##STR1## wherein R is one of ethyl, isobutyl or n-hexyl.

Processes For Producing Cis Alkyl-2-Methyl-3-Pentenoates And Isomer Mixtures Containing High Proportions Of Cis Alkyl-2-Methyl-3-Pentenoates
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US Patent:

39312933, Jan 6, 1976
Filed:

Jul 22, 1974
Appl. No.:

5/490719
Inventors:

Ching Y. Tseng - Middletown NJ
John B. Hall - Rumson NJ
Manfred Hugo Vock - Locust NJ
Joaquin F. Vinals - Red Bank NJ
Edward J. Shuster - Brooklyn NY
Assignee:

International Flavors & Fragrances Inc. - New York NY
International Classification:

C07C 6954
US Classification:

260486R
Abstract:

Methods for producing cis-alkyl-2-methyl-3-pentenoates and isomeric mixtures containing high proportions (greater than 50%) of cis C. sub. 2 -C. sub. 6 alkyl-2-methyl-3-pentenoates.

Process For The Preparation Of Trans-.Delta..sup.9 -Isoambrettolide
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US Patent:

40641449, Dec 20, 1977
Filed:

Dec 22, 1976
Appl. No.:

5/753461
Inventors:

Ching Y. Tseng - Middletown NJ
Assignee:

International Flavors & Fragrances Inc. - New York NY
International Classification:

C07D31300
US Classification:

260343
Abstract:

A process is described for producing trans-. DELTA. sup. 9 -isoambrettolide from aleuritic acid in three reaction steps; first forming a dioxolane by treatment with an excess amount of an orthoformate or a dialkyl formamide dialkyl acetal; then forming the corresponding bengalene acid derivative by heating the dioxolane with acetic anhydride; and then cyclizing the resulting trans bengalene acid derivative by heating it, thereby yielding a high quality substantially pure or 100% pure trans-. DELTA. sup. 9 -isoambrettolide.

Intermediate In The Process For The Preparation Of Trans-.Delta..sup.9 -Isoambrettolide
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US Patent:

40149021, Mar 29, 1977
Filed:

Jun 9, 1976
Appl. No.:

5/694452
Inventors:

Ching Y. Tseng - Middletown NJ
Assignee:

International Flavors & Fragrances Inc. - New York NY
International Classification:

C07D31710
US Classification:

2603409
Abstract:

A process is described for producing trans-. DELTA. sup. 9 -isoambrettolide from aleuritic acid in three reaction steps; first forming a dioxolane by treatment with an excess amount of an orthoformate or a dialkyl formamide dialkyl acetal; then forming the corresponding bengalene acid derivative by heating the dioxolane with acetic anhydride; and then cyclizing the resulting trans bengalene acid derivative by heating it, thereby yielding a high quality substantially pure or 100% pure trans-. DELTA. sup. 9 -isoambrettolide.

Alkyl Esters Of 2-Methyl-4-Pentenoic Acid
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US Patent:

39667995, Jun 29, 1976
Filed:

May 21, 1975
Appl. No.:

5/579567
Inventors:

John B. Hall - Rumson NJ
Ching Y. Tseng - Middletown NJ
Manfred Hugo Vock - Locust NJ
Joaquin Vinals - Red Bank NJ
Edward J. Shuster - Brooklyn NY
Assignee:

International Flavors & Fragrances Inc. - New York NY
International Classification:

C07C 6952
US Classification:

260486R
Abstract:

Methods are described for adding the novel compounds, isobutyl and n-hexyl esters of 2-methyl-4-pentenoic acid to foodstuffs, chewing gums or medicinal products in order to impart sweet, fruity, strawberry, pineapple-like, pear and/or green aromas and tastes.