A chiral SPINOL derived phosphoric acid-catalyzed asymmetric N-alkylation reaction of indoles with cyclic α-diaryl-substituted N-acyl imines, which are generated in situ from 3-aryl 3-hydroxyisoindolinones, has been demonstrated. The transformation proceeds smoothly with a broad range of indoles and isoindolinone alcohols. A variety of indole derived N-alkylated tetrasubstituted chiral aminals were
Application of 7-Indolylmethanols in Catalytic Asymmetric Arylations with Tryptamines: Enantioselective Synthesis of 7-indolylmethanes
作者:Hai-Qing Wang、Meng-Meng Xu、Ying Wan、Yu-Jia Mao、Guang-Jian Mei、Feng Shi
DOI:10.1002/adsc.201800150
日期:2018.5.2
The application of 7‐indolylmethanols in catalyticasymmetric reactions has been established via an enantioselective arylation reaction with tryptamines in the presence of chiral phosphoric acid, which afforded a series of structurally diversified chiral 7‐indolylmethanes in moderate to good yields and generally excellent enantioselectivities (23 examples, up to 92% ee). This reaction not only provides
using a novel type of axially chiral styrene-phosphine ligand SJTU-PHOS-1 was developed. This reaction demonstrated good functional group compatibility and a wide range scope of substrates in mild conditions. Moreover, the DFT calculations expounded the coordination mode of the metal catalyst and the axially chiral styrene-phosphine ligand in the enantioselectivity control.
Enantioselective Construction of Pyrroloindolines via Chiral Phosphoric Acid Catalyzed Cascade Michael Addition–Cyclization of Tryptamines
作者:Quan Cai、Chuan Liu、Xiao-Wei Liang、Shu-Li You
DOI:10.1021/ol302043s
日期:2012.9.7
Enantioselective construction of pyrroloindolines via chiral phosphoric acid catalyzed cascade Michael addition-cyclization of tryptamines has been realized. With 5 mol % of chiral phosphoric acid, enantioenriched pyrroloindoline derivatives were obtained in good yields and enantioselectivity (up to 95% yield and 83% ee) from readily available tryptamines and enones.