Selective biocatalytic aminolysis of (±)-epichlorohydrin: Synthesis and ICAM-1 inhibitory activity of (S)-(+)-3-arylamino-1-chloropropan-2-ols
作者:Pankaj Gupta、Sumati Bhatia、Ashish Dhawan、Sakshi Balwani、Shatrughan Sharma、Raju Brahma、Rajpal Singh、Balaram Ghosh、Virinder S. Parmar、Ashok K. Prasad
DOI:10.1016/j.bmc.2011.02.029
日期:2011.4
Regio-and enantioselective synthesis of (S)-(+)-3-arylamino-1-chloropropan-2-ols has been achieved by the epoxide ring opening of (+/-)-epichlorohydrin with different aromatic amines in the presence of Candida rugosa lipase. Activities of seven model (S)-(+)-3-arylamino-1-chloropropan-2-ols, out of 10 compounds synthesized, have been evaluated for the inhibition of tumor necrosis factor-alpha TNF-alpha) induced expression of intercellular adhesion molecule-1 (ICAM-1), which is one of the factors responsible for the modulation of inflammation in biological systems; (S)-(+)-1-chloro-3-(2'-chlorophenylamino)-propan-2-ol has been found to exhibit highest activity, that is, 86% inhibition of TNF-alpha induced expression of ICAM-1 at a concentration of 40 mu g/ml. (C) 2011 Elsevier Ltd. All rights reserved.
Li, Wanmei, Journal of the Chemical Society of Pakistan, 2012, vol. 34, # 3, p. 669 - 672
作者:Li, Wanmei
DOI:——
日期:——
Brønsted Acid‐Catalysed Epoxide Ring‐Opening Using Amine Nucleophiles: A Facile Access to
<i>β</i>
‐Amino Alcohols
A transition metal-free facile access to β-amino alcohols via epoxide ring-opening with amine nucleophiles. The process is carried out at room temperature with only 0.5 mol % catalyst loading. A wide spectrum of styrene oxide and aniline derivatives are readily tolerated by this procedure. A highly effective gram-scale synthesis with a high TON=842 is also reported.