Process for the preparation of tricyclic amino alcohol derivatives
申请人:ASAHI KASEI KABUSHIKI KAISHA
公开号:US20030225289A1
公开(公告)日:2003-12-04
A process for the preparation of tricyclic amino alcohol derivatives including 2-[N-[2-(9H-carbazol-2-yloxy)ethyl]]amino-1-[(3-methylsulfonylamino)phenyl]ethanol useful in the treatment of diabetes, obesity, hyperlipidemia and so on; and intermediates as represented by formula (5) or (6) or the like useful in the preparation, wherein R11 is hydrogen or the like; and *1 represents an asymmetric carbon atom. 2-Halo-1-(3-nitrophenyl)ethanone derivatives and 1-(3-nitrophenyl)oxirane derivatives, which are intermediates for the preparation of tricyclic amino alcohol derivatives, are easy of purification, and particularly optically active 1-(3-nitrophenyl)oxirane derivatives are effective in enhancing the optical purities of the final products.
PROCESSES FOR THE PREPARATION OF TRICYCLIC AMINO ALCOHOL DERIVATIVES
申请人:Asahi Kasei Kabushiki Kaisha
公开号:EP1209150A1
公开(公告)日:2002-05-29
A process for the preparation of tricyclic amino alcohol derivatives including 2-[N-[2-(9H-carbazol-2-yloxy)ethyl]]amino-1-[(3-methylsulfonylamino)phenyl]ethanol useful in the treatment of diabetes, obesity, hyperlipidemia and so on; and intermediates as represented by formula (5) or (6) or the like useful in the preparation, wherein R11 is hydrogen or the like; and *1 represents an asymmetric carbon atom. 2-Halo-1-(3-nitrophenyl)ethanone derivatives and 1-(3-nitrophenyl)oxirane derivatives, which are intermediates for the preparation of tricyclic amino alcohol derivatives, are easy of purification, and particularly optically active 1-(3-nitrophenyl)oxirane derivatives are effective in enhancing the optical purities of the final products.
Tandem Concurrent Processes: One-Pot Single-Catalyst Biohydrogen Transfer for the Simultaneous Preparation of Enantiopure Secondary Alcohols
作者:Fabricio R. Bisogno、Iván Lavandera、Wolfgang Kroutil、Vicente Gotor
DOI:10.1021/jo802350f
日期:2009.2.20
A novel one-pot tandem biohydrogen transfer process to concurrently obtain two enantiopure sec-alcohols is presented; thus, using a suitable single enzyme and a catalytic amount of cofactor, several interesting building blocks could be easily achieved in an enantiocomplementary fashion, minimizing dramatically the quantity of reagents usually employed in the "coupled-substrate" approach.
US6696573B1
申请人:——
公开号:US6696573B1
公开(公告)日:2004-02-24
Whole-cell yeast-mediated preparation of (R)-2-chloro-1-(3-nitrophenyl)ethanol as a synthetic precursor for (R)-phenylephrine
The incubated whole-cell biocatalyst of Pichia minuta JCM 3622 reduced 2-chloro-1-(3-nitrophenyl)ethanone to provide (R)-2-chloro-1-(3-nitrophenyl)ethanol with 99.2% ee in 87% isolated yield in the presence of Amberlite XAD-7 as a reservoir for the hydrophobic, crystalline and toxic substrate. The product was transformed to (R)-1-(3-hydroxyphenyl)-2-methylaminoethanol (PhenylePhrine,1a), a selective alpha(1)-adrenergic receptor agonist, in 98.0% ee over five steps. (C) 2013 Elsevier B.V. All rights reserved.