Synthetic approaches to 2-(4-hydroxy-7-chromanyl)benzoic acids as antagonists of leukotriene B4
作者:R.J. Chambers、K. Koch、M.S. Biggers、M. Ramchandani
DOI:10.1016/s0960-894x(98)00276-5
日期:1998.7
coupling, a non steroselective reduction and a chromatographic resolution limited the utility of this synthetic route. To address these issues, a new synthetic route was developed utilizing a palladium catalyzed coupling of aryl oxazolines in tandem with a stereospecific enone reduction as key synthetic steps. Resolution was achieved by fractional crystallization of a (S)-(-)-alpha-methylbenzylamine salt
1的结构修饰导致2和3所示的一系列2-(4-羟基-7-苯甲基)苯甲酸LTB4拮抗剂。有机锡烷联芳基偶联,非立体选择性还原和色谱分离的使用限制了其的应用。这条合成路线。为了解决这些问题,开发了一种新的合成路线,该路线利用钯催化的芳基恶唑啉与立体定向的烯酮还原反应串联作为关键的合成步骤。通过(S)-(-)-α-甲基苄基胺盐的分步结晶实现拆分。