A new strategy for the synthesis of pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidines and pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidines
作者:Ahmad Sami Shawali、Hamdi M. Hassaneen、Nabil Kh. Shurrab
DOI:10.1016/j.tet.2008.08.082
日期:2008.11
A series of pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidines were prepared via oxidative cyclization of aldehyde N-(1,3-diphenylpyrazolo[3,4-d]pyrimidin-4-yl)hydrazones. Dimroth rearrangement of such a series yielded pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidines.
一系列吡唑并[4,3- ë ] [1,2,4]三唑并[4,3- C ^ ]通过的醛氧化环化来制备的嘧啶ñ - (1,3- diphenylpyrazolo [3,4 d ]嘧啶-4-基)hydr。这种系列的Dimroth重排产生了吡唑并[4,3- e ] [1,2,4]三唑并[1,5- c ]嘧啶。