Patent · US Expired

Preparation of n-vinyllactams

US5670639A · kind A · utility

2Cited by

3References

9Claims

0Family size

Assignee

BASF SE

Inventors

Martin Schmidt-Radde · Beindersheim, DE
Marc Heider · Neustadt, DE
Albrecht Dams · Monsheim, DE
Harald Rust · Bochum, DE

Key dates

Filing date	Mar 13, 1996
Grant date	Sep 23, 1997
Priority date	—
Expiry date	Mar 13, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D223/10
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

N-Vinyllactams of the general formula I ##STR1## where n is from 1 to 3, are prepared by a process which comprises reaction of a lactam of the general formula II ##STR2## where n is from 1 to 3, with from 10 to 90 percent by weight of an aqueous alkali metal hydroxide solution with distillation at from 50.degree. to 250.degree. C. and from 1 to 100 mbar and with a residence time of from 0.1 to 5 hours and subsequent reaction with acetylene at from 60.degree. to 250.degree. C. and from 1 to 100 bar.

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