Patent · US Expired

Process for the manufacture of N,N-(Dibenzohexatrienylene)ureas

US4847374A · kind A · utility

0Cited by

2References

12Claims

0Family size

Assignee

Ciba-Geigy · US

Inventors

Georg Acklin · Arlesheim, CH
Ernst Aufderhaar · Kaiseraugst, CH
Günter Kaupp · Jessenitz Siedlung, DE
Bernhard Raz · Basel, CH
Ulrich Vogel · Magden, CH

Key dates

Filing date	Jan 19, 1988
Grant date	Jul 11, 1989
Priority date	—
Expiry date	Jan 19, 2008

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D223/22
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

N,N-(dibenzohexatrienylene)urea medicaments can be manufactured in a smooth one-step reaction by reacting a corresponding N,N-(dibenzohexatrienylene)amine with cyanic acid.

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