The Wilkinson complex RhCl(PPh3)(3) catalyzes equilibrating alkylthio exchange reaction of thioesters with disulfides. The treatment of a thioester and a dialkyl disulfide in refluxing diethyl ketone in the presence of RhCl(PPh3)(3) (2.5 mol %) for 1.5 h gave an alkylthio exchanged thioester. The reaction of S-methyl ester was conducted shifting the equilibrium by removing volatile dimethyl disulfide. (c) 2008 Elsevier Ltd. All rights reserved.
Vancomycin disulfide derivatives as antibacterial agents
作者:YongQi Mu、Matthew Nodwell、John L. Pace、Jeng-Pyng Shaw、J.Kevin Judice
DOI:10.1016/j.bmcl.2003.11.040
日期:2004.2
A series of lipidated vancomycin analogues 1 bearing disulfide bonds within their lipid chains was designed and synthesized to optimize their ADME profiles while retaining antibacterial potency. These compounds exhibited good activity against resistant organisms and low accumulation in tissues such as kidney and liver. (C) 2003 Elsevier Ltd. All rights reserved.