Method for synthesizing 2-acetyl-1-pyrroline, stable ketal precursors thereof, and isotopically marked analogs
US8597706B2 · kind B2 · utility
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Key dates
| Filing date | Jun 24, 2010 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Jun 24, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D207/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a method for synthetizing a compound of the following formula (I):wherein R is a methyl or ethyl group, n is 1 or 2, and X is a CH2 or CD2 group, from a compound of the following formula (II):wherein R and n are as defined above,and also relates to a method for assaying the compounds of the formula (I) using a corresponding deuterated derivative as an internal reference, as well as to the use of ketal derivatives of compounds of the formula (I) as a stable precursor, in particular in a flavoring composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.