Patent · US Expired

Method for producing triazolinethione derivatives

US6372916B1 · kind B1 · utility

0Cited by

0References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Reinhard Lantzsch · Leverkusen, DE
Manfred Jautelat · Burscheid, DE
Achim Hupperts · Düsseldorf, DE
David Erdman · Neunburg vorm Wald, DE

Key dates

Filing date	Dec 28, 2000
Grant date	Apr 16, 2002
Priority date	—
Expiry date	Dec 28, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D249/12
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

According to a novel process, it is possible to prepare triazolinethione derivatives of the formula in which R1 and R2 are each as defined in the description bya) reacting hydrazine derivatives of the formula  with carbonyl compounds of the formula in which R3 and R4 are each as defined in the description with potassium thiocyanate, sodium thiocyanate or ammonium thiocyanate,if appropriate in the presence of a diluent and if appropriate in the presence of an acid, andb) reacting the resulting triazolidinethione derivatives of the formula  with formic acid, if appropriate in the presence of a catalyst and if appropriate in the presence of a diluent.The triazolidinethione derivatives of the formula (V) are novel.

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