Patent · US Expired

Process for preparing 2-amino-6-chloropurine

US5663338A · kind A · utility

2Cited by

0References

4Claims

0Family size

Assignee

Boehringer Ingelheim GmbH · DE

Inventors

Reiner Ramert · Weiler bei Bingen, DE
Rainer Sobotta · Ingelheim am Rhein, DE

Key dates

Filing date	Apr 15, 1996
Grant date	Sep 2, 1997
Priority date	—
Expiry date	Apr 15, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D473/40
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a new and improved process for preparing 2-amino-6-chloropurine comprising the step of reacting guanine in the presence of ammonium sulphate with hexamethyldisilazane. The process of this invention advantageously results in a high yield of 2-amino-6-chloropurine and may be carried out on a laboratory or an industrial scale.

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