Patent · US Expired

Preparation of 2-methylbenzoxazole

US5151523A · kind A · utility

0Cited by

10References

3Claims

0Family size

Assignee

BASF SE

Inventors

Manfred Gaeng · Frankenthal (Pfalz), DE
Heinz Saukel
Wolfgang Hoffmann · Lippstadt, DE
Josef Koenig · Monsheim, DE

Key dates

Filing date	Mar 11, 1991
Grant date	Sep 29, 1992
Priority date	—
Expiry date	Mar 11, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D263/56
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing 2-methylbenzoxazole by cyclizing acetamidophenol with the simultaneous elimination of the water of reaction. The process involves the drying and melting of the acetamidophenol, the cyclization of acetamidophenol to 2-methylbenzoxazole, and the removal of the water of reaction and the 2-methylbenzoxazole from the reaction mixture after the cyclization step by distillation. All the steps are carried out in a dryer.

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