Synthesis, annulation, and heterofunctionalization of 4-hydrazinylpyrazolo[1,5-а]pyrazines
作者:Nazar M. Tsizorik、Yevhenii V. Hrynyshyn、Anna R. Musiychuk、Andriy V. Bol’but、Nadezhda V. Panasenko、Mikhailo V. Vovk
DOI:10.1007/s10593-018-2337-4
日期:2018.7
4-Hydrazinylpyrazolo[1,5-а]pyrazines were obtained by reactions of 4-chloropyrazolo[1,5-а]pyrazines with hydrazine hydrate and further combined with compounds having one reactive site (triethyl orthoformate, acetic anhydride, ethyl chloroformate, phenyl isothiocyanate, hydrazoic acid) or two reactive sites (diethyl oxalate), forming the respective derivatives containing fused 1,2,4-triazole, tetrazole
4- Hydrazinylpyrazolo [1,5 а由4-氯吡唑并[1,5的反应获得]吡嗪а ]吡嗪与水合肼和进一步与具有一个反应位点的化合物(原甲酸三乙酯,乙酸酐,氯甲酸乙酯,苯基结合异硫氰酸酯,氢氰酸或两个反应位点(草酸二乙酯),分别形成含有稠合的1,2,4-三唑,四唑或1,2,4-三嗪环的衍生物。与丙二腈或氰基乙酸乙酯的乙酰丙酮和乙氧基亚甲基的反应用于合成4-(1-吡唑基)取代的吡唑并[1,5- α ]吡嗪。