Halocyclobutanol Dehydration En Route to Halocyclobutenes

Abstract

A new method for the preparation of halocyclobutenes has been developed. The developed process relies on halocyclobutanols dehydrated by means of tetrafluoroboric acid in dichloromethane at room temperature. The process allows for high yields of halocyclobutenes to be achieved with alcohols that do not trigger the formation of isomeric allylic halides.