The catalytic decarboxylative allylation of enol carbonates: the synthesis of enantioenriched 3-allyl-3′-aryl 2-oxindoles and the core structure of azonazine
作者:K. Naresh Babu、Souvik Pal、Arindam Khatua、Avishek Roy、Alakesh Bisai
DOI:10.1039/d1ob02048j
日期:——
The catalytic asymmetric synthesis of 3-allyl-3′-aryl 2-oxindoles has been shown via the Pd(0)-catalyzed decarboxylative allylation of allylenol carbonates. This methodology provides access to a variety of 2-oxindole substrates (5a–v) with all-carbon quaternary stereocenters (up to 94% ee) at the pseudobenzylic position under additive-free and mild conditions. The synthetic potential of this method
3-烯丙基-3'-芳基2-羟吲哚的催化不对称合成已通过Pd(0)催化的烯丙醇碳酸酯的脱羧烯丙基化反应得到证实。该方法提供了在无添加剂和温和条件下在假苄基位置上具有全碳四元立体中心(高达 94% ee)的各种 2-羟吲哚底物 ( 5a-v ) 的途径。该方法的合成潜力通过基于二酮哌嗪的生物碱唑嗪 ( 11 ) 的四环核心的不对称合成显示。