A common synthesis of cyclobutanones involves the rearrangement of 1-alkoxy-or 1- (phenylthio) cyclopropylcarbinols under acidic conditions. We report that the synthetically useful 2-vinylcyclobutanones can be prepared in good yield in the absence of protonic acids by treating vinyl-1-(methoxycyclopropyl) carbinols with triflic anhydride in the presence of 2, 6-di-tert-butyl-4-methylpyridine in methylene chloride. The product is formed before ...
