Enantiospecific and regioselective opening of 2-alkyl nosylaziridines by indoles mediated by boron trifluoride. Application to a practical synthesis of a GnRH antagonist
作者:Roger N Farr、Ramon J Alabaster、John Y.L Chung、Bridgette Craig、John S Edwards、Andrew W Gibson、Guo-Jie Ho、Guy R Humphrey、Simon A Johnson、E.J.J Grabowski
DOI:10.1016/j.tetasy.2003.08.038
日期:2003.11
An efficient, high yield process for the synthesis of a GnRH antagonist has been developed. We have demonstrated that under boron trifluoride mediation, nosyl aziridines will react with 2-arylindole derivatives to afford β-substituted tryptamines in an enantiospecific process with remarkably high regioselectivity. The scope of the reaction was explored with several 2-substituted nosyl aziridines. The
已经开发了用于合成GnRH拮抗剂的有效,高产率的方法。我们已经证明,在三氟化硼的介导下,壬基氮丙啶会与2-芳基吲哚衍生物反应,以对映特异性的方法提供具有高区域选择性的β-取代的色胺。用几种2-取代的壬基氮杂氮丙啶探索反应的范围。关键反应是为GnRH拮抗剂程序明确开发的,并已在40千克规模上得到证明。