Controlled and diastereoselective synthesis of α-(3-hydroxy-2 oxoindolin-3-yl)-β-aminopropanoates
作者:Muthumanickam Shenbagapushpam、Thennila Muthukumar、Muthu Mareeswaran Paulpandian、Arun Prasath Lingam Kandhapalam、Selvakumar Kodirajan
DOI:10.1016/j.tet.2019.03.052
日期:2020.10
An efficient synthesis of non-natural, diastereoselective, α-hydroxyoxoindolin appended β-aminoester derivatives has been demonstrated from unprotected Morita-Baylis-Hillman (MBH) adducts of oxindole via simple aza-Michael addition strategy. The judicious choice of sodium hydride and bulky 2,4,6-triisopropylbenzenesulphonamide provided a controlled and diastereoselective addition products with MBH
已通过简单的aza-Michael加成策略,从未保护的oxindole的Morita-Baylis-Hillman(MBH)加合物证明了合成非天然,非对映选择性,α-羟基氧代吲哚的β-氨基酯衍生物的有效方法。明智的选择氢化钠和大体积的2,4,6-三异丙基苯磺酰胺,首次提供了可控制的非对映选择性加成产物与羟吲哚的MBH加合物。