Patent · US Expired

Process for the preparation of dichloroisonitrilocarboxylic acid esters

US4652671A · kind A · utility

2Cited by

0References

4Claims

0Family size

Assignee

Dynamit Nobel GmbH · DE

Inventors

Gunter Bison · Troisdorf, DE
Norbert Linkat
Klaus Thewalt · Witten, DE

Key dates

Filing date	Sep 12, 1985
Grant date	Mar 24, 1987
Priority date	—
Expiry date	Sep 12, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D257/04
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

It is suggested to produce 5-chloro-1H-tetrazolecarboxylic acid esters by reaction of dichloroisonitriloacetic acid esters with alkali or metal azides or ammonium azide. The dichloroisonitriloacetic acid esters required for this purpose are formed by reacting N-formylaminocarboxylic acid esters with chlorine or with compounds which split off chlorine.

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