A Practical Approach to Semicarbazone and Hydrazone Derivatives via Imino-isocyanates
作者:Keira Garland、Wei Gan、Charlotte Depatie-Sicard、André M. Beauchemin
DOI:10.1021/ol4016089
日期:2013.8.16
Complex hydrazone derivatives can be accessed readily from hydrazones upon heating in the presence of nucleophiles. This reactivity likely involves imino-isocyanate intermediates, and a variety of leaving groups can be used at temperatures ranging from 20 to 150 °C. Alcohols, thiols, primary, and secondary amines can be used as nucleophiles, thus providing a simple alternative to the synthesis of hydrazones
在亲核试剂的存在下加热后,可以轻易从中获得复杂的derivatives衍生物。这种反应性可能涉及亚氨基异氰酸酯中间体,可以在20至150°C的温度范围内使用各种离去基团。醇,硫醇,伯胺和仲胺可用作亲核试剂,因此提供了一种简单的替代方法,可通过在母体羰基母体上缩合并进行后期衍生化来合成。