An Enantioselective Approach to 2,3‐Disubstituted Indolines through Consecutive Brønsted Acid/Pd‐Complex‐Promoted Tandem Reactions
作者:Ying Duan、Mu‐Wang Chen、Zhi‐Shi Ye、Duo‐Sheng Wang、Qing‐An Chen、Yong‐Gui Zhou
DOI:10.1002/chem.201100576
日期:2011.6.20
In tandem: A divergent and enantioselective approach to 2,3‐disubstituted indolines was developed through consecutive Brønsted acid/Pd‐complex‐promoted tandem reactions from simple 2‐substituted indoles and aldehydes in one operation to give up to 98 % ee (see scheme; R1=H, F, or Me; R2=alkyl; R3=aryl or alkyl). Three Brønsted acid promoted steps and two Pd‐catalyzed hydrogenation steps were involved
串联:通过一次简单的2-取代的吲哚和醛类的连续Brønsted酸/ Pd-络合物促进的串联反应,开发了一种对2,3-二取代的二氢吲哚的发散和对映选择性的方法,使ee高达98% (参见方案) ; R 1= H,F或Me; R 2=烷基; R 3=芳基或烷基)。此过程涉及三个Brønsted酸促进步骤和两个Pd催化的氢化步骤。