functionalized diheteroaryl and diaryl ketones was developed using Ru-catalysts of minimal stereogenicity. Various ketone substrates with structurally and electronically similar groups attached to the prochiral centers were reduced successfully in good to excellent enantioselectivities and yields. This protocol provides practical and efficient access to chiral diheteroarylmethanols and benzhydrols,
An easy route to optically active 1-substituted-1-pyridyl-methylamines by diastereoselective reduction of enantiopure N-tert-butanesulfinyl ketimines
作者:Giorgio Chelucci、Salvatore Baldino、Simona Chessa、Gerard A. Pinna、Franco Soccolini
DOI:10.1016/j.tetasy.2006.11.026
日期:2006.11
The reduction of enantiopure N-tert-butanesulfinyl ketimines derived from pyridyl ketones afforded the related N-tert-but-anesulfinyl amines with high yields and diastereoselectivities. (c) 2006 Elsevier Ltd. All rights reserved.
Asymmetric synthesis of 1-substituted-1-(pyridin-2-yl)methylamines by diastereoselective reduction of enantiopure N-p-toluenesulfinyl ketimines
Reduction of enantiopure N-p-toluenesulfinyl ketimines derived from 2-pyridyl ketones affords N-p-toluenesulfinyl amines with good yields and diastereoselectivities. (c) 2005 Elsevier Ltd. All rights reserved.
Conformational control of propeller-like chirality in Zn(II) complexes: Tightly balanced steric bias
作者:Yu-Hung Chiu、Osvaldo dos Santos、James W Canary
DOI:10.1016/s0040-4020(99)00713-9
日期:1999.10
The conformational behavior of a series of chiral tripodal ligand-Zn(II) complexes was examined. The ligands adopt propeller-like conformations upon complexation of trigonal bipyramidal metal ions such as Zn(II), with the chirality of the propeller determined by the absolute configuration of a single chiral center in one of the tripod arms. Surprisingly, increasing the size of the substituent in the