N,N-Dialkyl-N′-Chlorosulfonyl Chloroformamidines in Heterocyclic Synthesis. Part XIV. Synthesis and Reactivity of the New Benzo[4,5]imidazo[1,2-b][1,2,6]thiadiazine Ring System
作者:Dylan Innes、Michael V. Perkins、Andris J. Liepa、Craig L. Francis
DOI:10.1071/ch17255
日期:——
compounds to produce benzo[4,5]imidazo[1,2-b][1,2,6]thiadiazine dioxides 6, 9, 12, and 14, representatives of a new ring system. Reaction of dichlorides 1 with trifluoroacetyl derivative 16 afforded benzo[4,5]imidazo[1,2-c]pyrimidines 19 and 20. An N-acyl and some N-alkyl derivatives of benzimidazo-thiadiazines 6 were prepared to demonstrate the potential of this new ring system as a novel scaffold for synthetic
Ñ,Ñ -二烷基N' -chlorosulfonyl chloroformamidines 1后行与1,3-区域选择性NCC反应双-亲核1 ħ -苯并咪唑-2-乙腈4个相关的化合物,以产生苯并[4,5]咪唑并[1,2 - b ] [1,2,6]噻二嗪二氧化物6,9,12,和14,一个新的环系的代表。使二氯化物1与三氟乙酰基衍生物16反应,得到苯并[4,5]咪唑并[1,2- c ]嘧啶19和20。安N制备了苯并咪唑-噻二嗪6的β-酰基和一些N-烷基衍生物,以证明该新环系统作为合成和药物化学应用的新型支架的潜力。用LiAlH 4处理4-氰基-5-甲基-苯并咪唑-噻二嗪26c导致腈的意想不到的显着转化,从而得到4,5-二甲基-苯并咪唑-噻二嗪29。