Metal-Free Synthesis of (<i>E</i>)-Monofluoroenamine from 1-Sulfonyl-1,2,3-triazole and Et<sub>2</sub>O·BF<sub>3</sub> via Stereospecific Fluorination of α-Diazoimine
作者:Ze-Feng Xu、Haican Dai、Lihong Shan、Chuan-Ying Li
DOI:10.1021/acs.orglett.7b04014
日期:2018.2.16
general, stereospecific, and straightforward method for the rapid preparation of functionalized (E)-monofluoroenamines is reported. Rather than transition metals (Rh, Ni, Pd, Cu, Ag, etc.), Et2O·BF3 was employed to promote the formation of α-diazoimine through the Dimroth equilibrium of common 1-sulfonyl-1,2,3-triazole for the first time. An overall migration of fluoride from boron to the diazo-linked carbon
报道了用于快速制备官能化的(E)-单氟烯胺的通用,立体定向和直接的方法。除了使用过渡金属(Rh,Ni,Pd,Cu,Ag等)以外,还使用Et 2 O·BF 3通过常见的1-磺酰基-1,2,3的Dimroth平衡促进α-重氮亚胺的形成。 -三唑首次。实现了氟化物从硼到α-重氮亚胺的重氮连接的碳的整体迁移。进行了生物活性分子的衍生和后期修饰。还提出了一个合理的机制。