从1-芳基-甲基获得3-二(甲基磺酰基)亚甲基-吡咯-2-酮和2-(1-芳基-5-甲氧基-2-氧代-2,3-二氢-1 H -3-吡咯亚烷基)丙二腈。 5-甲氧基吡咯烷酮。氮丙啶和羟胺与吡咯-2-酮反应,分别得到2,7-二氮杂螺[4.4] nona-3,6-二烯和肟衍生物。吡咯并[2,3- c ^ ]异恶唑或吡咯并[2,3- c ^ ]异噻唑形成以高收率从取决于用于环闭合的反应条件肟。用乙酸乙酯中的N 1,N 2-二(4-氯苯基)乙of处理吡咯亚甲基丙二腈,得到的pine庚因衍生物的收率为70-75%。
Novel heterocycles: a convenient synthesis of pyrrolo[2,3-d]pyrazole; cycloaddition reaction of N-aryl(methyl)pyrrol-2,3-diones to diazomethane and olefins
作者:Hisham A. Abd El-Nabi
DOI:10.1016/s0040-4020(96)01107-6
日期:1997.2
The cycloadditionreaction of the pyrrol-2,3-diones 1a–e to equimolar amount of diazomethane gave 2-aryl(methyl)-2-azabicyclo[3.1.0]hexane 3a–e together with 5,6-dioxo-1H-pyrrolo[2,3-d]pyrazole derivatives 4a–e. While 1a-e reacted with an excess of diazomethane to give the corresponding N-methyl derivatives 5a-e with a minor amount of 3a-e. Treatment of 4a-e with excess of diazomethane gave 5a-e quantitatively