Abstract
Allenes have been efficiently prepared by the reaction of propargylic esters (benzoates, acetates, carbonates) with triorganoindium compounds (R 3 In) under palladium catalysis, via an 5 N 2' rearrangement. The reaction proceeds smoothly at room temperature with a variety of aryl-, alkenyl-, and alkynylindium reagents. The yields obtained are high and the regioselectivity is complete both in the case of terminal and nonterminal propargylic esters.
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