Reduction of alpha-bromosulfones 1, 5, 13-16 by cat.(PhSe)(2)/NaBH4 oc
curred site-selectively in high yields. This reduction of 1,3- or 1,4-
dibromobis(sulfone) 21 and 25 was applied to intramolecular coupling r
eactions to give the three- and four-membered carbocycles 26-28. (C) 1
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