Asymmetric Palladium-Catalyzed Allylic Alkylation Using Dialkylzinc Reagents: A Remarkable Ligand Effect
作者:Antonio Misale、Supaporn Niyomchon、Marco Luparia、Nuno Maulide
DOI:10.1002/anie.201309074
日期:2014.7.1
palladium‐catalyzed asymmetric allylic alkylation reaction with diorganozinc reagents, which displays broad functional group compatibility, is reported. This novel transformation hinges on a remarkable ligand effect which overrides the standard “umpolung” reactivity of allyl–palladium intermediates in the presence of dialkylzincs. Owing to its mild conditions, enantioselective allylic alkylations of racemic
报道了偶然发现的钯催化的与二有机锌试剂的不对称烯丙基烷基化反应,该反应显示出广泛的官能团相容性。这种新的转化取决于一个显着的配体效应,该效应在二烷基锌存在下超越了烯丙基钯中间体的标准“空子”反应性。由于其温和的条件,在敏感官能团的存在下,外消旋烯丙基亲电试剂的对映选择性烯丙基烷基化是可能的。