Stereoselectivity of an ω-transaminase-mediated amination of 1,3-dihydroxy-1-phenylpropane-2-one
摘要:
The stereoselectivity of a recently isolated omega-transaminase from Chromobacterium violaceum in the amination of 1,3-dihydroxy-1-phenylpropan-2-one has been determined. The enzyme is not enantioselective towards a racemic mixture of 1,3-dihydroxy-1-phenylpropan-2-one but is highly stereoselective forming (2S)-2-amino-1-phenyl-1,3-propanediols in >99% ee. (C) 2009 Elsevier Ltd. All rights reserved.
METHODS AND COMPOSITIONS FOR PREVENTING OPIOID ABUSE
申请人:Waterville Valley Technologies, Inc.
公开号:US20160326182A1
公开(公告)日:2016-11-10
Abuse-resistant opioid compounds, drug delivery systems, pharmaceutical compositions comprising an opioid covalently bound to a chemical moiety are provided. Methods of delivering an active ingredient to a subject and methods of preventing opioid abuse are also provided.
α,α′-Dihydroxyketone formation using aromatic and heteroaromatic aldehydes with evolved transketolase enzymes
作者:James L. Galman、David Steadman、Sarah Bacon、Phattaraporn Morris、Mark E. B. Smith、John M. Ward、Paul A. Dalby、Helen C. Hailes
DOI:10.1039/c0cc02911d
日期:——
Transketolase mutants have been identified that accept aromatic acceptors with good stereoselectivities, in particular benzaldehyde for which the wild type enzyme showed no activity.
Chemistry of dihydro-1,4-dioxin III a new method for the preparation of α,α′-dihydroxy ketones from ketones and aldehydes
作者:Marcel Fetizon、Pierre Goulaouic、Issam Hanna
DOI:10.1016/s0040-4039(00)94987-6
日期:1985.1
Title compounds, 7, were prepared fromketones and aldehydes via the intermediate 3 by methanolic peracid epoxidation followed by NaBH4 reduction and acidic hydrolysis. Application of this method to the preparation of the unnatural corticoid side chain was reported.
An operationally simple protocol is reported to generate an α-hydroxyacyl anion by the decarboxylation of dihydroxyfumaricacid. To date, the “missing” utilization of the hydroxyacyl anion in highly chemo- and stereoselective cascade reactions enables short and direct construction of carbohydrates.
作者:Mark E. B. Smith、Kirsty Smithies、Tarik Senussi、Paul A. Dalby、Helen C. Hailes
DOI:10.1002/ejoc.200500986
日期:2006.3
the biocatalytic formation of acyclicalpha,alpha'-dihydroxy ketones by transketolase is well documented in the literature, there is currently no one-pot chemical synthesis of these dihydroxy ketones available. Here, we report preliminary results of an atom-efficient one-pot synthesis of alpha,alpha'-dihydroxy ketones in water by a mimic of the transketolase reaction. The formation of a quaternary