intermediate for a family of compounds (1). Essential to the success of the coupling is the use of fluoride in combination with a phase transfer catalyst. The development of an alternative route to bicyclic piperazine 2 that uses l-aspartic acid (20) as a starting material to avoid the need for a classical salt resolution is described.
据报道,该过程的发展涉及关键的CN键的形成,该过程涉及((7 R,9a S)-八氢-1 H-
吡啶基[1,2- a ]
吡嗪-7-基)
甲醇(2)经历亲核芳族取代用3-
氯苯并[ d ]
异恶唑(3)提供((7 R,9a S)-2-(苯并[ d ]
异恶唑-3-基)八氢-1 H-
吡啶并[1,2- a ]
吡嗪- 7-基)
甲醇(4)作为一系列化合物的关键中间体(1)。偶联成功的关键是将
氟化物与相转移催化剂结合使用。描述了开发以1-
天冬氨酸(20)为起始原料的双环
哌嗪2的替代途径,以避免经典的盐拆分的需要。