Ultrasound-Assisted Preparation of Di-tert-Butyl-,Di-1,1′ Adamantyl- and (1-Adamantyl)-tert-Butylketenes

Abstract

Di-tert-butyl-, di(1-adamantyl)- and (1-adamantyl)-tert-butylketenes were prepared in excellent yield from their corresponding acetyl chlorides with triethylamine under ultrasonic irradiation, showing a dramatic improvement over attempted conventional dehydrochlorination.