Patent · US Expired

Intermediates useful for preparing 4,6-diaminopyrido[5,4-d]pyrimidines

US6849734B2 · kind B2 · utility

1Cited by

2References

23Claims

0Family size

Assignee

BOEHRINGER INGELHEIM PHARMA GMBH & CO. KG · DE

Inventors

Werner Belzer · Sankt Goar, DE
Ralf Lock · Mainz, DE
Werner Rall · Mittelbiberach, DE

Key dates

Filing date	Sep 25, 2003
Grant date	Feb 1, 2005
Priority date	—
Expiry date	Sep 25, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D487/04
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

2-Chloro-4,6-diamino-7,8-dihydropyrimido[5,4-d]pyrimidine of the formula II wherein

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