Patent · US Expired

Pyranone, process for its preparation, its use in the preparation of a new pyridinone and a process for the preparation of same

US5292885A · kind A · utility

2Cited by

5References

8Claims

0Family size

Assignee

ISOCHEM · FR

Inventors

Didier G. Wirth · Limoges, FR
Dominique Gibert · Clermont, FR
Laurence Ferrucio · Paris, FR

Key dates

Filing date	Aug 13, 1990
Grant date	Mar 8, 1994
Priority date	—
Expiry date	Aug 13, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D309/38
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

2,3,5-(4H)-Trimethyl pyranone having the formula: ##STR1## which is prepared by acetylation of a ketone derived from 2-formyl-3-pentanone and preparation of 2,3,5-(1H)-trimethyl 4-pyridinone having the formula: ##STR2## by ammonolysis of the 2,3,5-(4H)-trimethyl 4-pyranone.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.