Efficient Synthesis of β-Aryl-γ-lactams and Their Resolution with (S)-Naproxen: Preparation of (R)- and (S)-Baclofen
作者:Iris Montoya-Balbás、Berenice Valentín-Guevara、Estefanía López-Mendoza、Irma Linzaga-Elizalde、Mario Ordoñez、Perla Román-Bravo
DOI:10.3390/molecules201219830
日期:——
An efficient synthesis of enantiomerically-pure β-aryl-γ-lactams is described. The principal feature of this synthesis is the practical resolution of β-aryl-γ-lactams with (S)-Naproxen. The procedure is based on the Michael addition of nitromethane to benzylidenemalonates, which was easily obtained, followed by the reduction of the γ-nitroester in the presence of Raney nickel and the subsequent sa
描述了对映异构纯 β-芳基-γ-内酰胺的有效合成。这种合成的主要特征是 β-芳基-γ-内酰胺与 (S)-萘普生的实际拆分。该程序基于硝基甲烷与亚苄基丙二酸酯的迈克尔加成,这很容易获得,然后在雷尼镍的存在下还原 γ-硝基酯,然后进行皂化/脱羧反应。该方法的实用性通过制备对映异构纯的 (R) - 和 (S) - 巴氯芬盐酸盐而得到强调。