Lipase-mediated stereoselective transformations of chiral organophosphorus P-boranes revisited: revision of the absolute configuration of alkoxy(hydroxymethyl)phenylphosphine P-boranes
作者:Małgorzata Kwiatkowska、Grzegorz Krasiński、Marek Cypryk、Tomasz Cierpiał、Piotr Kiełbasiński
DOI:10.1016/j.tetasy.2011.08.024
日期:2011.7
moderate stereoselectivity to give both the unreacted substrates and their O-acetyl derivatives. The absolute configurations of the products, which were earlier ascribed on the basis of the stereoselective reduction of the corresponding phosphine oxides with borane and comparison with the literature data concerning bicyclic phosphine oxides, were disputed by theoretical calculation. Some additional
脂肪酶促进的一系列烷氧基(羟甲基)苯基膦P-硼烷的动力学拆分以适度的立体选择性进行,从而得到未反应的底物和它们的O-乙酰基衍生物。产物的绝对构型在理论计算上受到争议,该产物的绝对构型先前是由于用硼烷对相应的膦氧化物进行了立体选择性还原并与有关双环膦氧化物的文献数据进行了比较。进行了一些其他的研究,包括理论计算和更精确的化学相关性,证明无环氧化膦的硼烷还原反应是在磷中心进行构型反转的,因此,先前对绝对构型的分配是不正确的。在此基础上,最终确定了酶促反应的立体化学。