Ester Synthesis in Water: <i>Mycobacterium smegmatis</i>
Acyl Transferase for Kinetic Resolutions
作者:Nicolas de Leeuw、Guzman Torrelo、Carolin Bisterfeld、Verena Resch、Luuk Mestrom、Emanuele Straulino、Laura van der Weel、Ulf Hanefeld
DOI:10.1002/adsc.201701282
日期:2018.1.17
The acyl transferase from Mycobacterium smegmatis (MsAcT) catalyses transesterification reactions in aqueous media because of itshydrophobic active site. Aliphatic cyanohydrin and alkyne esters can be synthesised in water with excellent and strikingly opposite enantioselectivity [(R);E>37 and (S);E>100, respectively]. When using this enzyme, the undesired hydrolysis of the acyl donor is an important
Synthesis of Optically Active Cyanohydrins Using Almond Meal
作者:P. Zandbergen、J. van der Linden、J. Brussee、A. van der Gen
DOI:10.1080/00397919108021286
日期:1991.6
Abstract Asymmetric hydrocyanation of aldehydes was accomplished using almond meal, containing the enzyme oxynitrilase. Opticallyactivecyanohydrins with high levels of enantiomeric purity were obtained following a simple procedure.
High-Throughput Preparation of Optically Active Cyanohydrins Mediated by Lipases
作者:Juliana Christina Thomas、Bruno Bernardi Aggio、Alfredo Ricardo Marques de Oliveira、Leandro Piovan
DOI:10.1002/ejoc.201601028
日期:2016.12
Cyanohydrins are versatile compounds with high applicability in organic synthesis; they are used as starting materials for the synthesis of other chemical targets with high industrial added value. Lipase-mediated kinetic resolution reactions are a promising route for the synthesis of optically active cyanohydrins. These reactions can be carried out through the acylation of cyanohydrins or the deacylation
The enzyme catalyzed synthesis of aliphatic (S)-cyanohydrins has been accomplished for the first time by application of a hydroxynitrile lyase from leaves of Hevea brasiliensis. The optical purities of (S)-cyanohydrins are in a range between 60-97%.
Enzyme-catalysed synthesis of optically active aliphatic cyanohydrins
作者:Tuomas T. Huuhtanen、Liisa T. Kanerva
DOI:10.1016/s0957-4166(00)82077-7
日期:1992.10
The enantioselective preparation of aliphatic (R)-cyanohydrins was studied using powdered almond meal, a rich source of mandelonitrile lyase, as a catalyst in organic solvent. The feasibility of powdered almond meal as a catalyst was compared to that of a purified enzyme preparation.