Application of optically active 1,2-diol monotosylates for synthesis of β-azido and β-amino alcohols with very high enantiomeric purity. Synthesis of enantiopure (R)-octopamine, (R)-tembamide and (R)-aegeline
Enantioselective synthesis of 1-arylethanediols by rhodium-catalyzed transfer hydrogenation of α-tosyloxyarylketones
摘要:
Catalytic transfer hydrogenation of alpha-tosyloxyarylketones mediated by a chiral rhodium complex using an azeotropic mixture of formic acid/triethylamine afforded the corresponding 1-arylethanediol monotosylates in excellent yield with high enantioselectivity.
Asymmetric transfer hydrogenation of 2-tosyloxy-1-(4-hydroxyphenyl)ethanone derivatives: synthesis of (R)-tembamide, (R)-aegeline, (R)-octopamine, and (R)-denopamine
作者:Do-Min Lee、Jong-Cheol Lee、Nakcheol Jeong、Kee-In Lee
DOI:10.1016/j.tetasy.2007.10.046
日期:2007.11
Catalytic transfer hydrogenation of 2-tosyloxy-1-(4-hydroxyphenyl)ethanone derivatives leads to efficient synthesis of (beta-adrenergic agonists, (R)-tembamide, (R)-aegeline, (R)-octopamine, and (R)-denopamine. (c) 2007 Elsevier Ltd. All rights reserved.
METHOD FOR THE PREPARATION OF OPTICALLY ACTIVE 2-SULFONYLOXY-1-PHENYLETHANOL DERIVATIVES
申请人:Lee Kee-In
公开号:US20100063317A1
公开(公告)日:2010-03-11
Optically active 2-sulfonyloxy-1-phenylethanol derivative of formula (II) can be prepared easily and selectively by the method of the present invention using an asymmetric reduction of an α-sulfonyloxy acetophenone compound with a rhodium catalyst having petamethylcyclopentadienyl group and a hydrogen donor, and the compound of formula (II) obtained in the inventive method exhibits a higher e.e. (enantiomer excess) value than that of the products in the conventional methods.
US8044245B2
申请人:——
公开号:US8044245B2
公开(公告)日:2011-10-25
Application of optically active 1,2-diol monotosylates for synthesis of β-azido and β-amino alcohols with very high enantiomeric purity. Synthesis of enantiopure (R)-octopamine, (R)-tembamide and (R)-aegeline