Neighboring Carbonyl Group Assisted Oxyacetoxylation of Propargylic Carboxylates with Retention of Chirality under Metal Free Condition
作者:Tapas R. Pradhan、Debendra K. Mohapatra
DOI:10.1002/adsc.201900314
日期:2019.8.5
reaction proceeds through the intramolecular nucleophilic attack of the neighboring carbonyl group on an alkynyliodonium intermediate. The process is general with broad substrate scope and is amenable for application to a variety of propargyl carboxylates including those obtained from naturalproducts. Insight into the mechanistic pathway by isotopic labelling (using H2O18 and D2O) and controlled experiments
提出了保留手性的伯,仲和叔炔丙基羧酸的无金属氧乙酰氧基化方法。该反应通过烷基炔酮中间体上相邻羰基的分子内亲核攻击而进行。该方法是一般的,具有广泛的底物范围,并且适用于包括从天然产物获得的那些炔丙基羧酸酯。通过同位素标记(使用H 2 O 18和D 2 O)洞察机械途径,并确认了对照实验。