The addition compound of 8-chloro-6,11-dihydro-11-(4-piperidylidene)-5H-benzo[5,6]cyclohepta[1,2-b]pyridine (descarboethoxyloratadine, desloratadine) with CO2, in molar ratio 2:1, is described. This unique form of desloratadine drug substance can be prepared in exceedingly high purity by a simple process from crude desloratadine. The addition compound is a useful intermediate in the manufacturing process
的加成化合物8-
氯-6,11-二氢-11-(4-亚
哌啶基)-5- ħ -苯并[5,6]环庚并[1,2 b ]
吡啶(descarboethoxyloratadine,
氯雷他定)与CO 2,在描述了摩尔比为2∶1。这种独特形式的去
氯雷他定原料药可以通过简单的方法由粗制去
氯雷他定制备成纯度极高的产品。加成化合物是
地氯雷他定晶型I多晶型物制造过程中有用的中间体。本文还公开了从
氯雷他定开始合成去
氯雷他定的一种改进的,环境友好的制造方法。