Visible-light-induced sulfonylation of Baylis–Hillman acetates under metal- and oxidant-free conditions

A visible-light-driven metal- and oxidant-free procedure for the sulfonylation of Baylis–Hillman acetates with sulfonyl hydrazides under open-air conditions at room temperature is reported. The methods provide a green and facile synthetic route to access allylic sulfones.

A facile and mild synthesis of trisubstituted allylic sulfones from Morita-Baylis-Hillman carbonates

An efficient and catalyst-free synthesis of trisubstituted allylic sulfones through an allylic sulfonylation reaction of Morita-Baylis-Hillman (MBH) carbonates with sodium sulfinates has been developed. Under the optimized reaction conditions, a series of trisubstituted allylic sulfones were rapidly prepared in good to excellent yields (71%–99%) with good to high selectivity (Z/E from 79:21 to >99:1). Compared with known synthetic methods, the current protocol features mild reaction temperature, high efficiency and easily available reagents.