Synthesis of N-phosphorylated sydnone imines and their functionalization via 4-Li derivatives. Novel bicyclic sydnone imines
作者:Alina S. Samarskaya、Ilya A. Cherepanov、Ivan A. Godovikov、Artem O. Dmitrienko、Sergey K. Moiseev、Valery N. Kalinin、Evamarie Hey-Hawkins
DOI:10.1016/j.tet.2018.04.015
日期:2018.5
N6-phosphorylated sydnone imines based on the reaction of sydnone imine hydrochlorides with substituted phosphinate or phosphonate acids chlorides in the presence of a base was elaborated. A possibility of straight deprotonation of sydnone imines with n-BuLi followed by the reaction 4-Li-derivatives thus obtained with electrophiles was demonstrated. Novel representatives of bicyclic sydnone imines fused
用于制备最新难以获得的高效率的克级方法Ñ 6 -基于与在碱的存在下取代次膦酸盐或膦酸盐的酸氯化物斯德酮亚胺盐酸盐的磷酸化反应斯德酮亚胺得到阐述。证明了用正丁基锂直接使sydnone亚胺脱质子化,然后与亲电试剂如此反应生成4-Li衍生物的可能性。稠合双环斯德酮亚胺的新颖代表经由获得了oxadiazolium环的4,5-边缘。还以高收率获得了同时具有磷和硫官能度的丁二酮亚胺。