Synthesis of new diheteroarylcarbazoles: a facile and simple route of 3,6-di(pyrazol-4-yl)carbazoles
作者:Ramu Meesala、Rajagopal Nagarajan
DOI:10.1016/j.tetlet.2006.08.087
日期:2006.10
A short and facile route to the synthesis of new 3,6-di(pyrazol-4-yl)carbazoles is reported. Dipyrazolylcarbazoles were synthesized in two steps from 3,6-diacetylcarbazoles through a Vilsmeier reaction which led to the formation of carbazolyl-β-chlorovinyl aldehydes, followed by cyclization with hydrazine hydrate. The reaction of the Vilsmeier reagent with hydrazones of diacetylcarbazoles yielded the
据报道,合成新的3,6-二(
吡唑-4-基)
咔唑的途径简便而快捷。从3,6-
二乙酰基
咔唑通过Vilsmeier反应分两步合成二
吡唑基
咔唑,该反应导致形成
咔唑基-β-
氯乙烯基醛,然后用
水合
肼环化。Vilsmeier试剂与
二乙酰基
咔唑的azo的反应以良好的产率得到了相应的
吡唑二
甲醛。