Abstract
An efficient method for the construction of sulfonylmethyl 1 H-indenes via Cu(I)-mediated sulfonyl radical-enabled 5- exo-trig cyclization of alkenyl aldehydes has been developed for the first time. Mechanistic studies indicated that a radical addition-cyclization-elimination (RACE) process might be involved. The reaction features a relatively broad substrate scope, good annulation efficiency, and varying functional group tolerance.
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