K. Okano et al., Stereoselective synthesis of optically active pyridyl alcohols via asymmetric transfer hydrogenation of pyridyl ketones, TETRAHEDR L, 41(48), 2000, pp. 9277-9280
A chiral Ru(II) complex, RuCl[(S,S)-N-(p-toluenesulfonyl)-1,2-diphenyl-ethy
lenediamine](p-cymene), serves as an efficient catalyst for asymmetric tran
sfer hydrogenation of 2-acetylpyridine with a substrate to catalyst molar r
atio of 200-1000 with HCOOH as a hydrogen source to give (S)-1-(2-pyridyl)e
thanol in an almost quantitative yield and with 95% ee. (C) 2000 Elsevier S
cience Ltd. All rights reserved.