Transformations of 2-alkylidene-4-oxothiazolidine vinyl bromides initiated by bromophilic attack of neutral and anionic nucleophiles
作者:Marija Baranac-Stojanović、Jovana Tatar、Milovan Stojanović、Rade Marković
DOI:10.1016/j.tet.2010.06.057
日期:2010.8
Vinyl bromides derived from 2-alkylidene-4-oxothiazolidines represent a class of vinyl halides, which readily undergo a bromophilic attack by a range of nucleophiles. With Ph3P, AcS−, CN−, I−, F−, Ac2CH− and N3− the attack ends up with reductive debromination, whereas the bromine substitution takes place with KSCN. When acetate anion and organic bases, such as pyridine, Et3N or morpholine, are employed
衍生自2-亚烷基-4-氧噻唑烷的乙烯基溴代表一类乙烯基卤,它们容易受到一系列亲核试剂的亲溴攻击。的Ph 3 P,ACS -,CN - ,我-,F -,AC 2 CH -和N 3 -攻击末端了还原脱溴,而溴取代发生与KSCN。当乙酸根阴离子和有机碱(例如吡啶,Et 3 N或吗啉)用作亲核试剂时,最初的亲溴性攻击随后是溴迁移到环的C(5)位置,从而使C(5)官能化杂环系统。