A New Protocol for a One-pot Synthesis of α-Amino Phosphonates by Reaction of Imines Prepared In Situ with Trialkylphosphites
作者:Mohammad R. Saidi、Najmedin Azizi
DOI:10.1055/s-2002-32957
日期:——
Imines prepared in situ by reaction of aldehydes and ketones with primary amines in ethereal solution of LiClO4 react readily at ambient temperature with trialkylphosphite to give high yields of α-amino phosphonates.
Ruthenium-Catalyzed Enantioselective C–H Functionalization: A Practical Access to Optically Active Indoline Derivatives
作者:Zhong-Yuan Li、Hetti Handi Chaminda Lakmal、Xiaolin Qian、Zhenyu Zhu、Bruno Donnadieu、Sarah J. McClain、Xue Xu、Xin Cui
DOI:10.1021/jacs.9b07251
日期:2019.10.9
developed for the first time, allowing for highly enantiose-lective synthesis of indoline derivatives via catalytic C-H activation. Commercially available Ru(II) arene complexes and chiral α-methylamines were employed as highly enantioselective catalysts. Based on a sterically rigidified chiral transient directing group, mul-ti-substituted indolines were produced in up to 92% yield with 96% ee. Further transformation
Synthesis of new chiralcis-3-hydroxyazetidines and their application in diethylzinc addition to aldehydes
作者:Zhanbin Zhang、Min Li、Guofu Zi
DOI:10.1002/chir.20470
日期:2007.11
A new series of chiral cis-3-hydroxyazetidines have been prepared from (R)-1-phenylethylamine. They have excellent catalytic activities and enantiomeric selectivities in asymmetricaddition of diethylzinc to aromatic aldehydes.
One-pot synthesis of optically active 1,4-disubstituted-3-carbamoyl-azetidinones from 5-[(N-arylamino)(hydroxyl)methylene]-2,2-dimethyl-1,3-dioxa-4,6-diones and chiral aldimines is achieved via thermal generation of carbamoyl ketenes and subsequent [2+2] cycloaddition. Three possible chiral induction approaches were tested and (R)-(+)-1-phenylethylamine was confirmed as the best chiral auxiliary. Among