Patent · US Expired

.beta.-Acyloxy-crotonic acid amide-N-sulfohalides and a process for their preparation

US3993689A · kind A · utility

0Cited by

0References

9Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Erwin Schmidt · Baltmannsweiler, DE
Karl Clauss · Hofheim, DE
Hartmut Pietsch · Bad Homburg vor der Höhe, DE
Harald Jensen

Key dates

Filing date	Jul 16, 1975
Grant date	Nov 23, 1976
Priority date	—
Expiry date	Jul 16, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D291/06
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Compounds of the formula ##SPC1## In which R represents an alkyl radical having from 1 to 4 carbon atoms and Hal stands for fluorine or chlorine are prepared by reacting at a temperature of from -40.degree. to +20.degree. C an i-propenylalkanoic acid ester of the formula ##EQU1## with an isocyanate of the formula EQU O=C=N--SO.sub.2 Hal (V) in which R and Hal have the same meaning as above, and isolating the compound of formula III.

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