The Reaction of Cyclopropenone with Thiol

Abstract

Diphenyl- and methylphenylcyclopropenones reacted easily with alkane- or arenethiol in the presence of potassium hydroxide in ethanol at room temperature to give ring opened 1: 1addition products, 2-propenethioate derivatives in 31∼82% yields. The reaction in the presence of excess amount of thiol yielded 1: 2 addition product via Michael addition.