Process for the preparation of benzoxazolyl- and...

Details Process for the preparation of benzoxazolyl- and... Process for the preparation of benzoxazolyl- and...

C - Chemistry, Metallurgy

07

D

260/309, 260/311

C07D 263/58 (2006.01) C07D 277/68 (2006.01)

Patent

CA 1210403

Abstract of the disclosure: Preparation of compounds of the formula Image in which X is oxygen or sulfur, R is halogen or CF3 and COOR1 is an ester group, by reaction of compounds of the formula Image with compounds of the formula Image in the presence of quaternary ammonium or phosphonium bases or crown ethers as catalysts.

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