A quinine-derived trifunctional sulphonamide catalyst has been developed for the effective asymmetric organocatalytic tandem aza-Henry reaction-cyclization of isatin-derived ketimines and nitroalkane-mesylates for the synthesis of spiro-pyrrolidine/piperidine-oxindoles. Demethylation of traditional bifunctional catalyst to incorporate an additional hydrogen bonding C6′–OH group plays the key role toward
已开发出
奎宁衍生的三官能磺酰胺催化剂,用于伊斯兰衍生的酮
亚胺和硝基烷-
甲磺酸酯的有效不对称有机催化串联aza-Henry反应-环化反应,以合成螺
吡咯烷/
哌啶-
吲哚。传统双功能催化剂的脱甲基结合一个额外的氢键C6'-OH基团对显着的对映选择性起着关键作用。