Desymmetrization of meso 7-aza-2,3-bis(phenylsulfonyl) bicyclo[2.2.1]hept-2-ene: a re-examination. Kinetic resolution of racemic 3-arylsulfonyl-7-aza-2-bromobicyclo[2.2.1]hepta-2,5-dienes
作者:Sergio Cossu、Paola Peluso
DOI:10.1016/j.tetlet.2006.04.014
日期:2006.6
The inexpensive large scale preparation of N-methoxycarbonyl-7-aza-2,3-bis(phenylsulfonyl)bicyclo[2.2.1]hept-2-ene and the re-examination of its stereoselective desymmetrization are reported. Moreover, the kinetic resolution of N-protected 3-arylsulfonyl-7-aza-2-bromobicyclo[2.2.1]hepta-2,5-dienes promoted by (R,R)-hydrobenzoin is described, representing a new tool to fix the absolute stereochemistry
据报道,N-甲氧基羰基-7-氮杂-2,3-双(苯磺酰基)双环[2.2.1]庚-2-烯的廉价大规模制备及其立体选择性去对称化的重新研究。此外,描述了由(R,R)-氢安息香素促进的N-保护的3-芳基磺酰基-7-氮杂-2-溴双环[2.2.1]庚-2,5-二烯的动力学拆分,代表了一种修复的新工具。 7-氮杂双环[2.2.1]骨架的绝对立体化学。