US 12,239,151 B2
2-acetylpyrroline precursor
Christian Starkenmann, Satigny (CH); and Yvan Niclass, Satigny (CH)
Assigned to FIRMENICH SA, Satigny (CH)
Appl. No. 17/621,825
Filed by FIRMENICH SA, Satigny (CH)
PCT Filed Aug. 6, 2020, PCT No. PCT/EP2020/072139
§ 371(c)(1), (2) Date Dec. 22, 2021,
PCT Pub. No. WO2021/023818, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 19190645 (EP), filed on Aug. 8, 2019.
Prior Publication US 2022/0361542 A1, Nov. 17, 2022
Int. Cl. A23L 27/20 (2016.01); C07D 207/08 (2006.01)
CPC A23L 27/2054 (2016.08) [C07D 207/08 (2013.01); A23V 2002/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A compound of formula

OG Complex Work Unit Chemistry
in the form of any one of its stereoisomers, tautomers, salts or as a mixture thereof,
wherein
the dotted line represents a single bond or no bond;
R1 represents a hydrogen atom or a C1 to C3 alkyl group optionally substituted by a carboxylic acid or a phenyl group;
R2 represents a hydrogen atom or a C1 to C6 hydrocarbon group; and
n is 0 when the dotted line represents a single bond or n is 1 when the dotted line represents no bond;
provided that 2-(2-acetylpyrrolidin-1-yl) acetic acid, 2-(2-acetylpyrrolidin-1-yl) butanoic acid, ethyl 2-(2-acetylpyrrolidin-1-yl) propanoate, methyl 2-(2-acetylpyrrolidin-1-yl) acetate, and 2-(2-acetylpyrrolidin-1-yl) propionic acid, and their stereoisomers, tautomers, and salts are excluded.