Bioreduction of aldehydes and ketones using Manihot species
摘要:
Biocatalysis constitutes an important tool in organic synthesis, especially for the preparation of chiral molecules of biological interest. A series of aliphatic and aromatic aldehydes and two ketones were reduced using plant cell preparations from Manihot esculenta and Manihot dulcis roots. The reduced products were typically obtained in excellent yields (80-96%), and with excellent enantiomeric excess (94-98%), except for vanillin. Esters, a nitrile, and an amide were also examined, but were not reduced. Preliminary conversion rate studies are reported. This is the first attempt to perform the biotransformation of carbonyl compounds using Manihot species. (c) 2006 Elsevier Ltd. All rights reserved.
Mixed-metal metalorganicframeworks have received considerable attention in recent years and it has been shown that the activity of the parent metalorganicframework (MOF) is often enhanced upon doping with external metal ions within the framework. In this context, Cu2+ ions with different loadings were incorporated within the ZIF-8 framework to obtain a series of Cu-doped ZIF-8 materials and their
Bioreduction of aldehydes and ketones using Manihot species
作者:Luciana L. Machado、João Sammy N. Souza、Marcos Carlos de Mattos、Solange K. Sakata、Geoffrey A. Cordell、Telma L.G. Lemos
DOI:10.1016/j.phytochem.2006.02.008
日期:2006.8
Biocatalysis constitutes an important tool in organic synthesis, especially for the preparation of chiral molecules of biological interest. A series of aliphatic and aromatic aldehydes and two ketones were reduced using plant cell preparations from Manihot esculenta and Manihot dulcis roots. The reduced products were typically obtained in excellent yields (80-96%), and with excellent enantiomeric excess (94-98%), except for vanillin. Esters, a nitrile, and an amide were also examined, but were not reduced. Preliminary conversion rate studies are reported. This is the first attempt to perform the biotransformation of carbonyl compounds using Manihot species. (c) 2006 Elsevier Ltd. All rights reserved.
Catalyst system and process for rearrangement of epoxides to allylic alcohols
申请人:——
公开号:US20030065230A1
公开(公告)日:2003-04-03
A catalyst system that can be used to achieve (a) preparation of allylic alcohols by rearrangement of the corresponding epoxide, when the allylic alcohol is a desired product; (b) subsequent reaction, e.g., selective oxidation, of the allylic alcohols obtained in step (a) to afford a desired product, e.g., alpha, beta-unsaturated carbonyl compounds; and/or (c) the ability to perform steps a) and b) in a one-pot process. In one embodiment, the catalyst system includes (i) at least one primary catalyst includes one or more homogeneous or heterogeneous, inorganic, organic or complex metal-containing compound, and (ii) at least one activator/modifier comprising at least one phenolic compound.