作者:Juan C. Carretero、Javier Rojo
DOI:10.1016/s0040-4039(00)60201-0
日期:1992.11
A new stereoselective synthetic route for the preparation of cis and trans disubstituted (and trisubstituted) γ-lactones starting from the readily available α-phenylsulfonyl-α,β-unsaturated esters 3 or α-phenylsulfonylbutenolides 4 is described. This method is based on the conjugate addition of Me3Al to compounds 3 and 4, which occurs with high, though opposite, facial selectivity.
描述了从容易获得的α-苯基磺酰基-α,β-不饱和酯3或α-苯基磺酰基丁烯化物4开始制备顺式和反式双取代(和三取代)γ-内酯的新的立体选择性合成路线。该方法基于将Me 3 Al共轭添加到化合物3和4中,尽管面部选择性高,但选择性相反。