The catalytic asymmetric Mannich-type reaction of 3-hydroxy/3-aminooxindoles with 2-aminoacrylates to afford oxindole-derived acyclic amino acid derivatives bearing vicinal tetrasubstituted stereocenters is reported. (DHQ)2PHAL (4g) and quinine-derived squaramide (4d) were identified as efficient catalysts. Transformations of the Mannich-type reaction products highlight the utility of this synthetic
报道了3-羟基/ 3-
氨基氧
吲哚与2-
氨基
丙烯酸酯的催化不对称曼尼希型反应以提供带有邻位四取代的立体中心的由氧
吲哚衍生的无环
氨基酸衍
生物。(DHQ)2 PHAL(4g)和
奎宁衍生的方酰胺(4d)被确定为有效的催化剂。曼尼希型反应产物的转化突出了这种合成策略的实用性。