[3,3]-Acyloxy Rearrangement-Triggered Regioselective Hydration of δ-Acetoxy-α,β-Alkynoates/Halo Alkynes
作者:Kishor L. Mendhekar、Tapas R. Pradhan、Debendra K. Mohapatra
DOI:10.1021/acs.joc.0c00061
日期:2020.4.3
that is facilitated by an unusual interception of an electrophilic intermediate by water generated via acetate group participation during [3,3]-acyloxy rearrangement. Various carboxylate-directing groups including acetate, acrylates, pivalates, benzoate or its derivatives, and those derived from bioactive natural products were successfully implemented to direct the regioselective hydration for various
在这里,我们报告了一种简单,有效,高度区域选择性和广谱水合作用的方法,该方法通过[3,3]-酰氧基重排过程中通过乙酸酯基团参与生成的水对亲电子中间体的不寻常拦截而得到促进。成功地实现了包括乙酸酯,丙烯酸酯,新戊酸酯,苯甲酸酯或其衍生物在内的各种羧酸酯导向基团,以及衍生自生物活性天然产物的那些,以指导区域选择性水合用于各种功能化的δ-酰氧基-β-酮酸酯合成。反应路径通过进一步证实18O标记实验,就我们所知,这是通过[3,3]-酰氧基重排过程中产生的亲电子中间体水合的第一个报道。合成应用包括可修饰的C5碳链,五元,六元和七元杂环的合成,以及天然产物的多样化。