Synthesis of 3-methylthio-1-phenyl-pyrazolo[3,4-<i>d</i>][1,2,4]triazolo[1,5-<i>a</i>]pyrimidin-4-one derivatives via tandem aza-Wittig reaction
作者:Jin Luo、Qiongwen Kang、Wenfei Huang、Jiajun Zhu、Tao Wang
DOI:10.1080/00397911.2019.1711414
日期:2020.3.3
procedure for the synthesis of 3-methylthio-1-phenyl-pyrazolo[3,4-d][1,2,4]triazolo[1,5-a]pyrimidin-4-one derivatives (4a–m) via tandem aza-Wittig and annulation reactions with iminophosphoranes 1, aryl isocyanate, and substituted 2-phenoxyacetohydrazide is described. This protocol provides a simple and facile approach to synthesize pyrazolo[3,4-d][1,2,4] triazolo[1,5-a]pyrimidine derivatives under mild conditions
摘要 一种合成 3-甲硫基-1-苯基-吡唑并[3,4-d][1,2,4]三唑并[1,5-a]嘧啶-4-one衍生物(4a- m) 描述了通过串联 aza-Wittig 和与亚氨基正膦 1、芳基异氰酸酯和取代的 2-苯氧基乙酰肼的成环反应。该协议提供了一种在温和条件下合成吡唑并 [3,4-d][1,2,4] 三唑并 [1,5-a] 嘧啶衍生物的简单易行的方法。图形概要