Patent · US Expired

Preparation of trichlorothiazole and intermediate

US4018784A · kind A · utility

0Cited by

2References

7Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Gunther Beck · Leverkusen, DE
Hans Holtschmidt

Key dates

Filing date	Dec 9, 1975
Grant date	Apr 19, 1977
Priority date	—
Expiry date	Dec 9, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D277/32
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Trichlorothiazole of the formula ##STR1## IS PREPARED BY REACTING 1,2,2,2-TETRACHLOROETHYL-ISOCYANIDEDICHLORIDE OF THE FORMULA ##STR2## WITH 1 TO 1.2 TIMES THE STOICHIOMETRIC AMOUNT OF SULFUR AT A TEMPERATURE OF ABOUT 150.degree. TO 250.degree. C, preferably about 170.degree. to 230.degree. C.

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