Cyclocondensation of n-(prop-2-yn-1-yl)- and n-(penta-2,4-diyn-1-yl)- o-phenylenediamines with phenyl isothiocyanate and carbon disulfide
作者:R. V. Novikov、N. A. Danilkina、I. A. Balova
DOI:10.1007/s10593-011-0831-z
日期:2011.9
nuclei simultaneously. From N-(prop-2-yn-1-yl)-o-phenylenediamines containing an aryl substituent at the triple bond, and N-(penta-2,4-diyn-1-yl)-o-phenylenediamines 2-methylidene-2,3-dihydro[1,3]thiazolo[3,2-a]benzimidazoles are formed. The latter are readily isomerized under the action of base giving thiazolo[3,2-a]benzimidazoles. The cyclocondensation of N-(alk-2-yn-1-yl)-o-phenylenediamines with
N-(prop-2-yn-1-yl)-o-苯二胺与异硫氰酸苯酯的环缩合导致1-(prop-2-yn-1-yl)-1,3-dihydro-2H-的形成苯并咪唑-2-硫酮与三键的取代基性质无关。在KOH存在下,邻苯二胺的单炔和二炔衍生物与二硫化碳的反应同时进行两个杂环核的形成。由在三键处包含芳基取代基的N-(丙-2-炔-1-基)-邻苯二胺和N-(戊-2,4-二炔-1-基)-邻苯二胺2-亚甲基形成了-2,3-二氢[1,3]噻唑并[3,2-a]苯并咪唑。后者在碱的作用下容易异构化,得到噻唑并[3,2-a]苯并咪唑。N-(alk-2-yn-1-yl)-o-苯二胺与CS 2的环缩合 导致[1,3]噻嗪[3,2-a]苯并咪唑。