The first synthesis of natural disulfide bruguiesulfurol and biological evaluation of its derivatives as a novel scaffold for PTP1B inhibitors
摘要:
Bruguiesulfurol (1), a cyclic 4-hydroxy-dithiosulfonate isolated from mangrove plant Bruguiera gymnorrhiza, was concisely synthesized for the first time in four steps, and a series of its synthetic derivatives were evaluated for in vitro inhibitory effects on PTP1B and related PTPs. Some derivatives were found to have improved pharmacological profile compared with hit 1. Among them, 5a showed the potent selectivity towards PTP1B over other PTPs, including TCPTP, and 7j exhibited the strongest PTP1B inhibitory activity with an IC50 value of 4.54 mu M. (C) 2013 Elsevier Ltd. All rights reserved.
Synthesis of triglycerides from 1,3-dibromopropan-2-ol
作者:Asharam Bhati、Richard J. Hamilton、David A. Steven、Rajender Aneja、Frederick B. Padley
DOI:10.1039/p29830001553
日期:——
1,3-Dibromopropan-2-ol (I) was converted into an acyl derivative (VI) by reaction with an appropriate acyl chloride in the presence of pyridine. The acyl derivative (VI) was subjected to nucleophilic substitution with 3 mol. equiv. tris(decyl)methylammonium carboxylate in refluxing hexane. This led to symmetrical diacid triglycerides in 90–94% yield. Substitution with an equimolar amount of the carboxylate