Syntheses and Some Reactions of 4<i>H</i>-Cyclohepta[4,5]pyrrolo[1,2-α]pyrimidin-4-ones
作者:Noritaka Abe
DOI:10.1246/bcsj.60.1053
日期:1987.3
The reaction of 2-aminocyclohepta[b]pyrroles with ethyl acetoacetate in phoshoryl chloride–polyphosphoric acid gives 2-methyl-4H-cyclohepta[4,5]pyrrolo[1,2-a]pyrimidin-4-ones. A ring closure of diethyl N-(cyclohepta[b]pyrrol-2-yl)aminomethylenemalonates gives 4-oxo-4H-cyclohepta[4,5]pyrrolo[1,2-a]pyrimidine-3-carboxylates (2) in phosphoryl chloride–polyphosphoric acid or in hot t-butylbenzene, which
2-氨基环庚[b]吡咯与乙酰乙酸乙酯在磷酰氯-多磷酸中反应生成2-甲基-4H-环庚[4,5]吡咯并[1,2-a]嘧啶-4-酮。N-(环庚[b]吡咯-2-基)氨基亚甲基丙二酸二乙酯的闭环得到磷酰基中的4-氧代-4H-环庚[4,5]吡咯并[1,2-a]嘧啶-3-羧酸酯(2)氯化物-多磷酸或在热叔丁基苯中,通过用热氢溴酸处理脱酯。化合物 2 在 C-3、C-11 和 C-7 位(按此顺序)对某些亲电子试剂进行置换反应。