Patent · US Expired

Novel process for the preparation of N,N'-bisacyl hydrazides

US4357277A · kind A · utility

0Cited by

3References

9Claims

0Family size

Assignee

Rutgerswerke Aktiengesellschaft · DE

Inventors

Winfried Orth
Fritz Lange · Neumünster, DE
Werner Fickert · Mannheim, DE

Key dates

Filing date	Jan 12, 1981
Grant date	Nov 2, 1982
Priority date	—
Expiry date	Jan 12, 2001

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61P25/18
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

An improved process for the preparation of acyl hydrazides of the formula ##STR1## wherein A and B individually are a group of the formula ##STR2## wherein R.sub.1 is selected from the group consisting of hydrogen and alkyl of 1 to 4 carbon atoms, x is 0 or 1 and R.sub.2 and R.sub.3 are individually selected from the group consisting of hydrogen and alkyl of 1 to 4 carbon atoms and n and m are individually 0, 1, 2 or 3 by reacting a compound of the formula ##STR3## with a hydrazide of the formula ##STR4## the improvement comprising effecting the reaction in the presence of at least one catalyst selected from the group consisting of amines, amine alkoxides and quaternary ammonium hydroxides.

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