Near absolute regio-, diastereo-, and enantioselectivity in a palladium: Catalyzed alkylation using an uncommon chiral auxiliary
作者:Ronald Sjouken、Rijko Ebens、Richard M. Kellogg
DOI:10.1002/recl.19921110107
日期:——
R-(+)-1-(2-chlorophenyl)-2,2-dimethyl-propan-1,3-diol (2) with a derivative (1) of 1-formylcyclohexene substituted in the 3-position with an acetoxy group proceeded with absolute stereospecificity at the acetal center. Catalytic alkylation of the π-allyl complex obtained upon reaction with Pd with the anion of dimethylmalonate proceeded at the 3-position of the cyclohexyl ring with complete stereocontrol
R-(+)-1-(2-氯苯基)-2,2-二甲基丙烷-1,3-二醇(2)与在3位上被取代的1-甲酰基环己烯的衍生物(1)缩合乙酰氧基在乙缩醛中心以绝对立体定向进行。与Pd与丙二酸二甲酯的阴离子反应后获得的π-烯丙基络合物的催化烷基化反应在环己基环的3位进行,且具有完全的立体控制。