首页> 外文期刊>Chemistry: A European journal >1-(alpha-Aminobenzyl)-2-naphthol: A New Chiral Auxiliary for the Synthesis of Enantiopure alpha-Aminophosphonic Acids
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1-(alpha-Aminobenzyl)-2-naphthol: A New Chiral Auxiliary for the Synthesis of Enantiopure alpha-Aminophosphonic Acids

机译:1-(α-氨基苄基)-2-萘酚:合成对映体纯α-氨基膦酸的新型手性助剂

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摘要

A new diastereoselective synthesis of alpha-aminophosphonates has been developed, based on the reaction, in the presence of trifluoroacetic acid, of trialkyl phosphites with chiral imines derived from (R)- or (S)-1-(alpha-aminobenzyl)-2-naphthol. The reaction proceeds at room temperature in toluene with high diastereoselectivity. The major diastereomer can be separated by crystallization from an appropriate solvent. The relative configuration of both chiral centers of the major diastereomer was determined by single-crystal X-ray structure analysis. The desired alpha-aminophosphonic acids can be obtained in enantiopure form by treatment of the corresponding diastereomers with HCl.
机译:基于在三氟乙酸存在下,亚磷酸三烷基酯与衍生自(R)-或(S)-1-(α-氨基苄基)-2的手性亚胺的反应,已经开发了一种新的非对映选择性合成α-氨基膦酸酯的方法。 -萘酚。反应在室温下在甲苯中以高非对映选择性进行。可以通过从适当的溶剂中结晶来分离主要的非对映异构体。主要的非对映异构体的两个手性中心的相对构型是通过单晶X射线结构分析确定的。所需的α-氨基膦酸可以通过用HCl处理相应的非对映异构体而以对映纯的形式获得。

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