Stereoselective SN2′ alkylation reaction sequence of the γ,δ-epoxy α,β-unsaturated ester system via γ,δ-chlorohydrin intermediates by the use of a R3Al–CuCN reagent
A novel stereoselective SN2′ alkylation reaction sequence of the γ,δ-epoxy α,β-unsaturatedester system has been developed which involves a regioselective substitution reaction with chloride ions at the γ-position and a subsequent SN2′ alkylation reaction of the resulting γ-chloro-δ-hydroxy derivatives with a R3Al–CuCN reagent. The new methodology was demonstrated to be applicable to a variety of substrates
已经开发了γ,δ-环氧α,β-不饱和酯系统的新型立体选择性S N 2'烷基化反应序列,其涉及在γ-位与氯离子的区域选择性取代反应和随后的S N 2'烷基化反应R 3 Al–CuCN试剂合成的γ-氯代-δ-羟基衍生物。事实证明,该新方法可适用于多种底物,并提供各种δ-羟基-α-烷基-β,γ-不饱和酯,包括以高度立体选择性的方式在α-位带有季不对称碳原子的那些酯,以及高产。
Eberbach, Wolfgang; Carre, Jean Claude, Chemische Berichte, 1983, vol. 116, # 2, p. 563 - 586
作者:Eberbach, Wolfgang、Carre, Jean Claude
DOI:——
日期:——
Eberbach, Wolfgang; Carre, Jean Claude, Chemische Berichte, 1981, vol. 114, # 3, p. 1027 - 1047
作者:Eberbach, Wolfgang、Carre, Jean Claude
DOI:——
日期:——
Pd-Catalyzed Stereospecific Azide Substitution of α,β-Unsaturated γ,δ-Epoxy Esters with Double Inversion of Configuration