Pyrimidine derivatives and related compounds. XXXIII. Reactions of 6-bromomethyl-5-formyl-1,3-dimethyluracil and its hydrazones with nucleophiles. Synthesis of pyrrolo(3,4-d)pyrimidines and pyrimido(4,5-d)pyridazines.
作者:KOSAKU HIROTA、YOSHIHIRO YAMADA、TETSUJI ASAO、SHIGEO SENDA
DOI:10.1248/cpb.29.1525
日期:——
The reactions of 6-bromomethyl-5-formyl-1, 3-dimethyluracil (1) and its hydrazones (6a and 6b) with nucleophiles were investigated. Treatment of 1 with primary amines or hydrazines afforded pyrrolo [3, 4-d] pyrimidines or pyrimido [4, 5-d] pyridazines, respectively. When 6-bromomethyl-1, 3-dimethyluracil-5-carboxaldehyde tosylhydrazone (6a) was treated with hydrazine hydrate, it was readily converted into pyrrolo [3, 4-d] pyrimidine (7) and pyrimido [4, 5-d] pyridazine (8). The reaction of 6-bromomethyl-1, 3-dimethyluracil-5-carboxaldehyde acetylhydrazone (6b) with hydrazine hydrate gave N-aminopyrrolo [3, 4-d] pyrimidine (9).
研究了6-溴甲基-5-甲醛-1,3-二甲基尿嘧啶(1)及其肼衍生物(6a和6b)与亲核试剂的反应。将1与初级胺或肼处理分别得到了吡咯并[3, 4-d]嘧啶或嘧啶并[4, 5-d]吡嗪。当6-溴甲基-1,3-二甲基尿嘧啶-5-甲醛对甲磺酸肼(6a)与肼水合物反应时,它很容易转化为吡咯并[3, 4-d]嘧啶(7)和嘧啶并[4, 5-d]吡嗪(8)。将6-溴甲基-1,3-二甲基尿嘧啶-5-甲醛乙酰肼(6b)与肼水合物反应得到N-氨基吡咯并[3, 4-d]嘧啶(9)。