Synthesis and biological activities of flavolipids
摘要:
Syntheses of the bacterial surfactants 6S 6S- 9S 9S- and 9U 9U-flavolipids confirmed the structures proposed for them from spectroscopic analysis of a flavolipid mixture and made pure flavolipids available for the first time All three synthetic flavolipids and a straight chain analogue were found to be weakly cytotoxic and to inhibit metastatic cancer cell migration with 9U 9U-fiavolipid (the most abundant natural flavolipid) having the most activity Biosynthetic routes to the branched side-chains of the flavolipids are suggested and it is proposed that branched chains are employed to hinder biodegradation (C) 2010 Elsevier Ltd All rights reserved
Synthesis and biological activities of flavolipids
摘要:
Syntheses of the bacterial surfactants 6S 6S- 9S 9S- and 9U 9U-flavolipids confirmed the structures proposed for them from spectroscopic analysis of a flavolipid mixture and made pure flavolipids available for the first time All three synthetic flavolipids and a straight chain analogue were found to be weakly cytotoxic and to inhibit metastatic cancer cell migration with 9U 9U-fiavolipid (the most abundant natural flavolipid) having the most activity Biosynthetic routes to the branched side-chains of the flavolipids are suggested and it is proposed that branched chains are employed to hinder biodegradation (C) 2010 Elsevier Ltd All rights reserved
A Convenient Method for the Conversion of <i>N</i>-Acyloxazolidinones to Hydroxamic Acids
作者:Mukund P. Sibi、Hikaru Hasegawa、Sandeep R. Ghorpade
DOI:10.1021/ol0263301
日期:2002.10.1
Treatment of N-acyloxazolidinones with hydroxylamines using samarium triflate as a Lewis acid provides the corresponding hydroxamicacids in 50-98% yields at room temperature. The conversion proceeds with high degree of chemoselectivity and without racemization of chiral centers alpha- to the acyl group. [reaction: see text]
Synthesis and biological activities of flavolipids
作者:Samiul M. Ahad、Alison L. Ange、Robert B. Bates、Bonnie L. Bell、Adria A. Bodour、Bryan R. Bourne、Cristina G. Contreras、Emily L. Goldberg、A.A. Leslie Gunatilaka、Sheryl King、Albert K. Lee、Rebecca L. Low、Raina M. Maier、Kathryn M. Marlor、Marilyn T. Marron、Ryan C. Scolnik、Matthew J. Streeter、Malgorzata Strelczuk、Long N. Trinh、Vu K. Truong、Sage P. Vissering、Megan C. Weick、Maria T. Williams
DOI:10.1016/j.tet.2010.09.088
日期:2010.11
Syntheses of the bacterial surfactants 6S 6S- 9S 9S- and 9U 9U-flavolipids confirmed the structures proposed for them from spectroscopic analysis of a flavolipid mixture and made pure flavolipids available for the first time All three synthetic flavolipids and a straight chain analogue were found to be weakly cytotoxic and to inhibit metastatic cancer cell migration with 9U 9U-fiavolipid (the most abundant natural flavolipid) having the most activity Biosynthetic routes to the branched side-chains of the flavolipids are suggested and it is proposed that branched chains are employed to hinder biodegradation (C) 2010 Elsevier Ltd All rights reserved