Asymmetric allylic substitutions usually display a pronounced preference for the formation of allylic substitution products with (E)-configured C=C double bonds as a result of π-allyl-Pd intermediates. A planar chiral palladacycle is shown to permit a catalytic asymmmetric allylationreaction maintaining the C=C double bond geometry of the allylicsubstrates in highly enantioenriched products.
由于 π-烯丙基-Pd 中间体,不对称烯丙基取代通常表现出明显优先于形成具有 ( E )-构型 C=C 双键的烯丙基取代产物。平面手性钯环可进行催化不对称烯丙基化反应,从而在高度对映体富集的产物中保持烯丙基底物的 C=C 双键几何结构。
BONGINI, A.;CARDILLO, G.;ORENA, M.;SANDRI, S.;TOMASINI, C., J. ORG. CHEM., 51,(1986) N 25, 4905-4910
作者:BONGINI, A.、CARDILLO, G.、ORENA, M.、SANDRI, S.、TOMASINI, C.