Catalyst- and Substituent-Controlled Regio- and Stereoselective Synthesis of Indolyl Acrylates by Lewis-Acid-Catalyzed Direct Functionalization of 3-Formylindoles with Diazo Esters
作者:Sana Jamshaid、Shreedhar Devkota、Yong Rok Lee
DOI:10.1021/acs.orglett.1c00277
日期:2021.3.19
A facile and efficient In(OTf)3- and BF3·OEt2-catalyzed direct transformation of 3-formylindoles with diazo esters has been developed for synthesizing diverse and functionalized indolyl acrylates. This one-pot protocol furnishes various (Z)-α-hydroxy-β-indolyl acrylates, (E)-β-(2-alkoxy-2-oxoethoxy)-α-indolyl acrylates, and (Z)-3-hydroxy-2-indolyl acrylates by a catalyst- and substituent-controlled
已开发了一种重氮化合物,可以轻松,高效地用In(OTf)3-和BF 3 ·OEt 2催化3-甲酰基吲哚的直接转化,以合成各种功能化的丙烯酸吲哚酯。此一锅操作方案可提供各种(Z)-α-羟基-β-吲哚基丙烯酸酯,(E)-β-(2-烷氧基-2-氧代乙氧基)-α-吲哚基丙烯酸酯和(Z)-3-羟基-丙烯酸酯丙烯酸2-吲哚基酯通过催化剂和取代基控制的区域和立体选择性级联反应。该方案具有几个优点,包括催化剂的低负载,温和的反应条件,范围宽和官能团耐受性高。合成的化合物可以进一步转化为多种功能化的材料。