Studies of the synthesis of heterocyclic compounds. Part VII. The preparation of some new 3- and 5-amino-pyrazoles by endocyclic<i>N</i>-substitution of 3(5)-aminopyrazoles
作者:Salvatore Plescia、Giuseppe Daidone、Maria L. Bajardi
DOI:10.1002/jhet.5570190351
日期:1982.5
By reaction of some 4-carbethoxy(or cyano)-3(5)-R-5(3)-aminopyrazoles 1 with 2-nitrobenzoyl chloride or 2-nitrobenzenesulfonyl chloride, a number of novel 3- and 5-amino-1-(2-nitrobenzoyl or 2-nitrobenzene-sulfonyl)pyrazoles 6 and 7 were obtained. Every compound appearing during the endocyclic N-substitution process can be identified and determined by glc. The use of nmr offers a rapid, unambigous
通过一些4-乙氧基(或氰基)-3(5)-R -5(3)-氨基吡唑1与2-硝基苯甲酰氯或2-硝基苯磺酰氯的反应,产生了许多新颖的3-和5-氨基-1-得到(2-硝基苯甲酰基或2-硝基苯磺酰基)吡唑6和7。可以通过glc识别和确定在环内N取代过程中出现的每种化合物。nmr的使用提供了一种快速,明确的方法来确定拟议的结构。