synthesis of 5-amino-3-aryl-1-(tert-butyl)-1H-pyrazole-4-carboxamides 1 has been devised. Preparation of pyrazole bromide 3 from potassium tricyanomethanide can be accomplished in only two steps in good yield and features a selective Sandmeyer reaction on the corresponding diaminopyrazole. This allows for a more versatile synthesis of 5-amino-3-aryl-1-(tert-butyl)-1H-pyrazole-4-carboxamides 1 than was previously
已经设计了一种简单,新颖且有效的合成5-
氨基-3-芳基-1-(叔丁基)-1 H-
吡唑-4-羧酰胺1的途径。由三
氰基
氨基
钾盐制备
吡唑溴化物3只需两个步骤即可完成,并且收率很高,并且具有对相应的
二氨基吡唑的选择性Sandmeyer反应的特性。这使得5-
氨基-3-芳基-1-(叔丁基)-1 H-
吡唑-4-羧酰胺1的合成比以前更通用。