申请人:A. H. Robins Company, Inc.
公开号:US04309552A1
公开(公告)日:1982-01-05
4-Nitro-1,2-hydrocarbyl pyrazolidines are prepared by a novel route from 1,2-disubstituted hydrazines and 1,3-di-(secondary amino)-2-nitropropanes and reduced to the corresponding 4-amino-1,2-hydrocarbyl pyrazolidines, which latter compounds are intermediates in the preparation of certain pharmaceutical benzamides. The novel 4-nitro-1,2-hydrocarbyl pyrazolidines have the formula: ##STR1## wherein R.sup.1 and R.sup.2 are selected from loweralkyl, lowercycloalkyl or phenyl-loweralkyl and may be the same or different.
4-硝基-1,2-羟基烷基吡唑啉是通过一种新颖的途径从1,2-二取代肼和1,3-二-(次烷基)-2-硝基丙烷制备的,并还原为相应的4-氨基-1,2-羟基烷基吡唑啉,后者是制备某些药物苯甲酰胺的中间体。新颖的4-硝基-1,2-羟基烷基吡唑啉的化学式为:##STR1## 其中R.sup.1和R.sup.2选择自低碳基,低环烷基或苯基-低碳基,可以相同也可以不同。