申请人:Suntory Limited
公开号:US04751232A1
公开(公告)日:1988-06-14
A novel pyrrolizidine derivative of the formula, ##STR1## which has potent antiarrhythmic activity and low toxicity is produced. The derivative can be synthesized: by acylating 2,6-xylidine to protect the amino group, nitrating the protected xylidine to introduce a nitro group at 3-position, reducing the nitro group to an amino group, followed by diazotizing and hydrolyzing, and then the resulted 3-hydroxy-2,6-dimethylaniline being condensed with 8-halocarbonylmethylpyrrolizidine; or by nitrating N-(2',6'-dimethyl)phenyl-8-pyrrolizidineacetamide to introduce a nitro group at 3'-position, reducing the nitro group to amino group, diazotizing the amino group and hydrolyzing the diazonium compound.
一种新的吡咯啉衍生物的化学式为##STR1##,具有强效的抗心律失常活性和低毒性。这种衍生物可以通过以下方法合成:首先,通过酰化2,6-二甲苯胺来保护氨基,然后对保护的二甲苯胺进行硝化以在3位引入一个硝基,接着将硝基还原为氨基,然后进行重氮化和水解,最后将得到的3-羟基-2,6-二甲基苯胺与8-卤代羰基甲基吡咯啉缩合;或者通过对N-(2',6'-二甲基)苯基-8-吡咯啉乙酰胺进行硝化以在3'-位引入一个硝基,然后将硝基还原为氨基,重氮化氨基并水解重氮化合物。