作者:Pauline Chaumont-Olive、Jacques Maddaluno、Anne Harrison-Marchand
DOI:10.1039/c9ob00547a
日期:——
The total synthesis of spiromastilactone A is reported for the first time. A swift strategy is presented that involves a pivotal enantioselective nucleophilic 1,2-alkylation of an aldehyde prepared in four quantitative synthetic steps from commercial 2,4-dihydroxybenzoic acid. This key reaction, which was described very recently by our group and carried out here on a gram scale, involves cheap and
首次报道了螺内酯内酯A的总合成。提出了一种快速的策略,该策略涉及在四个定量合成步骤中由商业2,4-二羟基苯甲酸制备的醛的关键对映选择性亲核1,2-烷基化。我们小组最近对这一关键反应进行了描述,并以克为单位进行了反应,该反应涉及廉价且易于获得的三配位手性氨基酰胺锌酸锂。所得的对映体富集的仲醇随后参与有效的分子内环化反应,从而提供目标的邻苯二甲酸酯核,并且有两个定量的附加步骤旨在脱保护酚基,然后在合成流程中引入氯原子。在8个合成步骤中,螺氨基苯甲酸内酯A的总收率为44%,R配置)。