Formation of cyclopropylsulfones from 1-arylsulfonyl-2-chloromethylprop-2-enes
Abstract
Methylenecyclopropyl sulfones are not formed when the title chlorosulfones are treated with methanolic methoxide; instead 1-arylsulfonyl-2-methoxy-2-methylcyclopropanes are formed by an addition–cyclisation sequence involving intramolecular displacement of chloride and not methoxide as suggested by other workers.