Selective One-Pot Synthesis of Trithiocarbonates, Xanthates, and Dithiocarbamates for Use in RAFT/MADIX Living Radical Polymerizations
作者:Murray R. Wood、David J. Duncalf、Steven P. Rannard、Sébastien Perrier
DOI:10.1021/ol0525617
日期:2006.2.1
via the interchange of xanthates (MADIX) polymerizations, via a one-pot reaction. 1,1'-Thiocarbonyl diimidazole (TCDI) undergoes controlled monosubstitution when reacted with secondary thiols or alcohols. The intermediate S/O-esters of imidazole-N-thionocarboxylic acid react efficiently with a range of primary thiols, alcohols, and amines to form asymmetrical dithiocarbonates, trithiocarbonates, and
[反应:见正文]我们报告了通过黄锅酸酯(MADIX)聚合反应的交换,通过一锅法反应,生产用于可逆加成断裂链转移(RAFT)和大分子设计的链转移剂的简便方法。当1,1'-硫代羰基二咪唑(TCDI)与仲硫醇或醇反应时,会经历受控的单取代。咪唑-N-硫代羧酸的中间体S / O-酯可与多种伯硫醇,醇和胺有效反应,分别形成不对称的二硫代碳酸酯,三硫代碳酸酯和二硫代氨基甲酸酯。该合成通过可逆的加成-断裂链转移(RAFT)机制为乙烯基单体的受控自由基聚合提供了一种简便的方法。