Stereochemistry and Construction of Tetrasubstituted Chiral Carbon Centers in Intramolecular Pd-Catalyzed 1,3-Chirality Transfer Reactions
作者:Nobuyuki Kawai、Jean-Marie Lagrange、Jun'ichi Uenishi
DOI:10.1002/ejoc.200601103
日期:2007.6
A PdII-catalyzed cyclization for the construction – from chiral allylic alcohols – of tetrahydropyrans containing tetrasubstituted chiral carbons proceeded stereospecifically by 1,3-chirality transfer through a syn-SN2′ type process. The chiral 2,2,6-trisubstituted tetrahydropyrans 5 and spiro hydropyrans 6 were obtained in high yields under mild reaction conditions.(© Wiley-VCH Verlag GmbH & Co. KGaA
PdII 催化的环化反应——由手性烯丙醇——包含四取代的手性碳的四氢吡喃的结构,通过 1,3-手性转移通过同步 SN2' 型过程立体定向地进行。在温和的反应条件下以高收率获得了手性 2,2,6-三取代四氢吡喃 5 和螺环氢吡喃 6。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)