Interrupted Oligomerization Revisited:  Simple and Efficient One-Pot Multicomponent Approach to Versatile Synthetic Intermediates

A novel multicomponent reaction allowing for a one-pot formation of three carbon−carbon bonds has been developed. It is based on in situ generation and anionic dimerization of methylenedithiane and produces a versatile synthetic equivalent of 4-hydroxy-1,3-alkanediones which, among other things, offers expeditious one-pot access to 3(2H)-furanones.