Abstract
Abstract Hydroaroylation of methyl acrylate 2a to give the α-aroyl esters 4 took place in the three-component reaction of 2a , aroyl chlorides 1 , and Et 2 MeSiH in the presence of 1 mol % of [Rh(cod)(PR 3 ) 2 ]OTf (cod = 1,5-cyclooctadiene, OTf = OSO 2 CF 3 , R = Ph ( 3a ), OPh ( 3b )) in CH 2 Cl 2 . GC and 1 H NMR investigation revealed that the rhodium-catalyzed hydroaroylation proceeds via two successive transformations, that is, hydrosilylation of 2a to afford silyl enol ether 5a followed by C–C bond formation between 5a and 1a .
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