An atom-economical hydrosulfonation of densely functionalized alkenes under catalyst-free conditions is described. Alkenes possessing a hydroxy-oxindole moiety underwent hydrosulfonation on treatment with arylsulfinic acids in green media to afford the resulting sulfones in 72–86% yields with excellent diastereoselectivity.
K. K. Dabaria, R. Bai, P. K. Jat and S. S. Badsara, New J. Chem., 2022, 46, 12905 DOI: 10.1039/D2NJ02462D
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