作者:Miao Wang、Teng Niu、Changming Xu                                    
                                    
                                        DOI:10.1002/ejoc.202400055
                                    
                                    
                                        日期:2024.4.2
                                    
                                    This work reports a thiophane-catalyzed dibromination of olefins using NBS as the sole bromine source, wherein a new type of catalytic umpolung strategy of N-bromoimides is revealed. The mechanistic investigation revealed that in situ generated 2,3-dihydrothiophene was the actual catalyst, which was responsible for the catalytic umpolung of NBS.
                                    这项工作报道了使用
NBS作为唯一
溴源的
噻吩催化烯烃二
溴化,其中揭示了一种新型的N-
溴酰亚胺催化反极性策略。机理研究表明,原位生成的 
2,3-二氢噻吩是实际的催化剂,负责 
NBS 的催化反极性。