Diels−Alder Reactions with 2-(Arylsulfinyl)-1,4-benzoquinones: Effect of Aryl Substitution on Reactivity, Chemoselectivity, and π-Facial Diastereoselectivity
作者:M. Carmen Carreño、José L. García Ruano、Antonio Urbano、Cynthia Z. Remor、Yolanda Arroyo
DOI:10.1021/jo9913107
日期:2000.1.1
Eu(fod)(3)- or BF(3).OEt(2)-catalyzed conditions. The synthesis of endo-adduct [4aS,5S,8R,8aR,SS]-9d resulting from cycloaddition on the substituted C(2)-C(3) double bond was achieved in a chemo- and diastereoselective way from quinone 1d in the presence of ZnBr(2). The reactivity and selectivity of the process proved to be dependent on the electron density of the arylsulfinyl group.