One-pot kinetic resolution–Mitsunobu reaction to access optically pure compounds, using silver salts in the substitution protocol
作者:Hiten B. Raval、Ashutosh V. Bedekar
DOI:10.1039/d0nj04802j
日期:——
Racemic carbinols were converted to chirally pure acetates by a combination of one-pot, enzyme mediated KR and Mitsunobu reaction with metal acetates. Use of AoNO3 or mixture with NaOAc gave excellent results. The protocol is further extended to introduce azide in place of acetate.
Derivatives of pyrazolopyrimidine compounds represented by Formula I are disclosed:
These pyrazolopyrimidine derivatives and pharmaceutical compositions comprising these derivatives are useful in the treatment of HIV mediated diseases and conditions.
A Catalyst for Efficient and Highly Enantioselective Hydrogenation of Aromatic, Heteroaromatic, and α,β-Unsaturated Ketones
作者:Mark J. Burk、William Hems、Daniela Herzberg、Christophe Malan、Antonio Zanotti-Gerosa
DOI:10.1021/ol000309n
日期:2000.12.1
[GRAPHICS]PhanePhos-ruthenium-diamine complexes catalyze the asymmetric hydrogenation of a wide range of aromatic, heteroaromatic, and alpha,beta -unsaturated ketones with high activity and excellent enantioselectivity.
Relationship between the structure and enantioselectivity in the asymmetric reduction of 2′,6′-disubstituted acetophenones with DIP-ChlorideTM. An ab initio study
作者:P.Veeraraghavan Ramachandran、Baoqing Gong、Herbert C. Brown、Joseph S. Francisco
DOI:10.1016/j.tetlet.2004.01.146
日期:2004.3
Using computational and chemical studies, a relationship between the % ee achieved and the dihedral angles between the plane of the aromatic ring and the plane containing the carbonyl group has been established for asymmetric reductions with B-chlorodiisopinocampheylborane. (C) 2004 Elsevier Ltd. All rights reserved.