Palladium-Catalyzed Dimerization of Vinyl Ethers to Acetals
作者:Changle Chen、Richard F. Jordan
DOI:10.1021/ja104523y
日期:2010.8.4
and silyl vinylethers to beta,gamma-unsaturated CH(2)=CHCH(2)CH(OR)(2) acetals, and they cyclize divinyl ethers to analogous cyclic acetals. A plausible mechanism comprises in situ generation of an active PdOR alkoxide species, double vinylether insertion to generate PdCH(2)CH(OR)CH(2)CH(OR)(2)} species, and beta-OR elimination to generate the acetal product. In the presence of vinylethers, (alpha-diimine)PdCl(+)