Patent · US Expired

Process for the preparation of cyclic 4-oxoamidines

US6037474A · kind A · utility

21Cited by

4References

25Claims

0Family size

Assignee

Degussa-Huels AG · DE

Inventors

Karlheinz Drauz · Alzenau, DE
Rolf Hoffmann · Brasschaat, BE
Ivan Pilgrims · Kontich, BE

Key dates

Filing date	Mar 25, 1999
Grant date	Mar 14, 2000
Priority date	—
Expiry date	Mar 25, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D235/02
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for the preparation of cyclic 4-oxoamidines. Such substances are precursors of active substances having biological action. The process according to the invention forms a further method of obtaining this class of compound. By reacting condensation products of aldehydes and aminonitriles or amino acid amides with oxidizing agents, the desired cyclic 4-oxoamidines are obtained according to the invention in good to very good yields.

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