Diastereoselective synthesis of α-aminoalkylphosphonic acid derivatives of Betti base
作者:K. E. Metlushka、D. N. Sadkova、L. N. Shaimardanova、K. A. Nikitina、A. I. Tufatullin、O. N. Kataeva、V. A. Alfonsov
DOI:10.1007/s11172-014-0608-5
日期:2014.6
3-isobutyl-1-phenylnaphthoxazine, a major diastereomer was isolated from the reaction mixture by crystallization. X-ray diffraction analysis was used to establish relative configuration of its chiral centers. This method can be also used for the preparation of α-aminobenzylphosphonic derivatives, which was shown using 1,3-diphenylnaphthoxazine as an example. Major diastereomers of α-aminobenzyl- and α-aminoalkylphosphonic
在卤代三甲基硅烷存在下,亚磷酸三乙酯与 3-烷基-1-苯基萘恶嗪反应,随后通过水解除去三甲基甲硅烷基,得到 Betti 碱的非对映异构 α-氨基烷基膦酸衍生物。在低温下与溴代三甲基硅烷的反应中观察到最高的非对映体过量。在3-异丁基-1-苯基萘恶嗪的情况下,主要的非对映异构体通过结晶从反应混合物中分离出来。X射线衍射分析用于建立其手性中心的相对构型。该方法也可用于制备 α-氨基苄基膦酸衍生物,以 1,3-二苯基萘恶嗪为例。