Abstract
Allenes have been efficiently prepared by the reaction of propargylic esters (benzoates,
acetates, carbonates) with triorganoindium compounds (R3 In) under palladium catalysis, via an SN 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.
Key words
allenes - indium organometallics - palladium catalysis - propargylic esters - regioselective
reactions
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