Utilization of organoselenium compounds. II Reaction of fused isoselenazoles with alkylamines.
作者:TAISEI UEDA、SATOKO KAWAI、JINSAKU SAKAKIBARA
DOI:10.1248/cpb.35.398
日期:——
A facile conversion of the methyl group of 5-amino-6-methyl-3-phenyl-4 (3H) -pyrimidinone (1) or 4-aminoantipyrine (5) to an alkyliminomethyl group by isoselenazole ring formation followed by reaction with alkylamines was carried out. 7-Oxo-6-phenyl-6H-isoselenazolo [4, 3-d] pyrimidine (2), which was obtained from 1 and selenium dioxide, was reacted with alkylamines, such as n-propylamine, isopropylamine and 3-methoxypropylamine, to give 6-alkyliminomethyl-5-amino-3-phenyl-4 (3H) -pyrimidinones (3a-d) in 47-58% yields. Treatment of 3a-d with silica gel gave 5-amino-6-formyl-3-phenyl-4 (3H) -pyrimidinone (4) in 91% yield. Similarly the reaction of 5, 6-dihydro-4-methyl-6-oxo-5-phenyl-4H-pyrazolo [4, 3-c] isoselenazole (6) with alkylamines gave 3-alkyliminomethyl-4-amino-1-phenyl-3-pyrazolin-5-ones (7a-f) in 50-97% yields.
通过形成异硒唑环,然后与烷基胺反应,将 5-氨基-6-甲基-3-苯基-4 (3H)-嘧啶酮 (1) 或 4-氨基安替比林 (5) 的甲基轻松转化为烷基亚氨基甲基:执行。由1和二氧化硒得到的7-Oxo-6-苯基-6H-异硒唑并[4, 3-d]嘧啶(2)与烷基胺如正丙胺、异丙胺和3-甲氧基丙胺反应,得到得到6-烷基亚氨基甲基-5-氨基-3-苯基-4(3H)-嘧啶酮(3a-d),产率47-58%。用硅胶处理3a-d得到5-氨基-6-甲酰基-3-苯基-4(3H)-嘧啶酮(4),产率91%。类似地,5, 6-二氢-4-甲基-6-氧代-5-苯基-4H-吡唑并[4, 3-c]异硒唑(6)与烷基胺反应得到3-烷基亚氨基甲基-4-氨基-1-苯基-3-吡唑啉-5-酮(7a-f),产率50-97%。