Cross-Linked Aggregates of (<i>R</i>)-Oxynitrilase: A Stable, Recyclable Biocatalyst for Enantioselective Hydrocyanation
作者:Luuk M. van Langen、Rhoderick P. Selassa、Fred van Rantwijk、Roger A. Sheldon
DOI:10.1021/ol047647z
日期:2005.1.1
[Reaction: see text] The (R)-oxynitrilase from almonds was immobilized as a cross-linkedenzymeaggregate (CLEA) via precipitation with 1,2-dimethoxyethane and subsequent cross-linking using glutaraldehyde. The resulting preparation was a highly effective hydrocyanation catalyst under microaqueous conditions, which suppress the nonenzymatic background reaction. The beneficial effect of these latter
Enantioselective cyanosilylation of aldehydes catalyzed by a multistereogenic salen–Mn(<scp>iii</scp>) complex with a rotatable benzylic group as a helping hand
A multistereogenic salen–Mn(iii) complex bearing an aromatic pocket and two benzylic groups as helping hands was found to be efficient in the catalysis of asymmetric cyanosilylation.
Compounds for the Inhibition of Cellular Proliferation
申请人:Chorev Michael
公开号:US20130178505A1
公开(公告)日:2013-07-11
Compositions and methods for inhibiting translation are provided. Compositions, methods and kits for treating (1) cellular proliferative disorders, (2) non-proliferative, degenerative disorders, (3) viral infections, (4) disorders associated with viral infections, and/or (5) non-proliferative metabolic disorders such as type II diabetes where inhibition of translation initiation is beneficial using the compounds disclosed herein.
An enantioselective preparation of O-acetylcyanohydrins has been accomplished by a three-step telescoped continuous process. The modular components enabled an accurate control of two sequential biotransformations, safe handling of an in situ generated hazardous gas, and in-line stabilization of products. This method proved to be advantageous over the batch protocols in terms of reaction time (40 min vs 345 min) and ease of operation, opening up access to reactions which have often been neglected due to safety concerns.
Asymmetric cyanohydrin formation from aldehydes catalyzed by manganese Schiff base complexes
The catalyst generated in situ from Mn(OAc)(2) and a chiral Schiff base ligand exhibited excellent catalytic abilities in asymmetric cyanohydrin formation from aldehydes with sodium cyanide in up to 99% enantioselectivity and good yield. (C) 2010 Elsevier Ltd. All rights reserved.