Indoline Catalyzed Acylhydrazone/Oxime Condensation under Neutral Aqueous Conditions
作者:Yuntao Zhou、Irene Piergentili、Jennifer Hong、Michelle P. van der Helm、Mariano Macchione、Yao Li、Rienk Eelkema、Sanzhong Luo
DOI:10.1021/acs.orglett.0c02128
日期:2020.8.7
condensation rate underneutralconditions limits its application. Herein, indolines with electron-donating groups are reported as a new catalyst scaffold, which can catalyze acylhydrazone, hydrazone, and oxime formation via an iminium ion intermediate. This new type of catalyst showed up to 15-fold rate enhancement over the traditional aniline-catalyzed reaction at neutralconditions. The identified