[EN] IMPROVED PROCESS FOR THE SYNTHESIS OF 1-(4-METHOXYPHENYL) ETHYLAMINE AND ITS ISOMERS<br/>[FR] PROCÉDÉ AMÉLIORÉ POUR LA SYNTHÈSE DE 1-(4-MÉTHOXYPHÉNYL) ÉTHYLAMINE ET SES ISOMÈRES
申请人:SUVEN LIFE SCIENCES LTD
公开号:WO2015159170A2
公开(公告)日:2015-10-22
The present invention relates to an improved and efficient process for the preparation of highly useful and versatile chiral compound (S)-(-)-l-(4-methoxyphenyl) ethylamine of formula (1) and formula (1-R) from novel chiral compounds (S)-[l-(4-Methoxyphenyl)-ethylidene]-(l-phenylethyl)amine of formula (16) and (R)-[l-(4-Methoxyphenyl)-ethylidene]-(l-phenylethyl)amine of formula (16-R) respectively.
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Asymmetric Reductive Amination of Ketones with Ammonia Borane
first example of metal-free B(C6F5)3-catalyzed asymmetric reduction amination of ketones with chiral α-methylbenzylamine (α-MBA) using ammonia borane as the reductant is reported. This one-pot method has a broad substrate scope and provides various chiralamines in 81–95% yield with 80–99% de. This protocol was further applied in the total synthesis of cinacalcet.
报道了使用氨硼烷作为还原剂,用手性α-甲基苄胺(α-MBA)进行的无金属的B(C 6 F 5)3催化的酮的不对称还原胺化的第一个实例。这种一锅法具有广泛的底物范围,并以81-95%的收率和80-99%的de提供了各种手性胺。该方案进一步应用于西那卡塞的全合成中。
Iron catalyzed diastereoselective hydrogenation of chiral imines
作者:D. Brenna、S. Rossi、F. Cozzi、M. Benaglia
DOI:10.1039/c7ob01123g
日期:——
Cyclopentadienone-based iron complexes were used for the first time to succesfully catalyze the diastereoselectivehydrogenation of enantiopure imines. Chiral amines, including valuable biologically active products, were obtained often as enantiomerically pure compounds. Computational studies helped to elucidate the chemical and stereochemical aspects of the iron-catalyzed reaction.