Catalytic Scope of the Thiamine-Dependent Multifunctional Enzyme Cyclohexane-1,2-dione Hydrolase
作者:Sabrina Loschonsky、Simon Waltzer、Sonja Fraas、Tobias Wacker、Susana L. A. Andrade、Peter M. H. Kroneck、Michael Müller
DOI:10.1002/cbic.201300673
日期:2014.2.10
cyclohexane‐1,2‐dione hydrolase (CDH) catalyzes the asymmetric cross‐benzoin reaction of aromatic aldehydes and pyruvate (up to quantitative conversion and 92–99 % ee). Notably, CDH accepts several aldehydes, such as hydroxybenzaldehydes, nitrobenzaldehydes, and naphthaldehydes; previously, these have only in rare cases been known as substrates of other thiamine‐dependent enzymes.
Pyruvate decarboxylase: a new enzyme for the production of acyloins by biotransformation
作者:Vladimír Křen、David H. G. Grout、Howard Dalton、David W. Hutchinson、Wilfred König、Margaret M. Turner、Gregory Dean、Nicholas Thomson
DOI:10.1039/c39930000341
日期:——
Highly purified pyruvate decarboxylase from yeast has been shown to catalyse the condensation between pyruvate and a wide range of substituted benzaldehydes to give hydroxyketones (acyloins) of the same (R) enantiomeric series and of high optical purity, as determined by chiral GC using novel cyclodextrin-based stationary phases.