Aldolases are key biocatalysts for stereoselective C-C bond formation allowing access to polyoxygenated chiral units through direct, efficient, and sustainable synthetic processes. Aldol reaction involving unprotected hydroxypyruvate and an aldehyde...
L-threonine aldolase in organic synthesis: Preparation of novel β-hydroxy-α-amino acids
作者:Vassil P. Vassilev、Taketo Uchiyama、Tetsuya Kajimoto、Chi-Huey Wong
DOI:10.1016/0040-4039(95)00720-w
日期:1995.6
The L-threonine aldolasefromCandidahumicola was used in the synthesis of multifunctional β-hydroxy-α-amino acids. Of many aldehydes with different substituents tested as substrates for reaction with glycine, benzyloxy- and alkoxy-aldehydes are found to be good substrates, providing a new synthetic route to α-amino-β,ω-dihydroxy and α,ω-diamino-β-hydroxy acids. The enzymatic reactions are not stereospecific
Chemoenzymatic Platform for Synthesis of Chiral Organofluorines Based on Type II Aldolases
作者:Jason Fang、Diptarka Hait、Martin Head‐Gordon、Michelle C. Y. Chang
DOI:10.1002/anie.201906805
日期:2019.8.19
addition and demonstrate engineering of the hydroxyl group stereoselectivity. Our aldolase collection is then employed in the chemoenzymatic synthesis of novel fluoroacids and ester derivatives in high stereopurity (d.r. 80-98 %). The compounds made available by this method serve as precursors to fluorinated analogs of sugars, amino acids, and other valuable chiral building blocks.
Enzymatic aldol reaction/isomerization as a route to unusual sugars
作者:J.Robert Durrwachter、H.M. Sweers、K. Nozaki、Chi-Huey Wong
DOI:10.1016/s0040-4039(00)84233-1
日期:1986.1
Utilizing fructosediphosphatealdolase and glucose isomerase as catalysts, 3-, 5, and 6-deoxy- and 6-0-methylhexoses have been synthesized from dihydroxyacetonephosphate or acetol phosphate and the corresponding hydroxypropionaldehydes.
family PF03328, recently described to be able to use hydroxypyruvic acid as nucleophile substrate, were shown to also catalyse aldol adducts formation from 2‐oxobutyric acid. A 1H NMR‐based assay was used to screen 21 aldolases for their activity towards 2‐oxobutyric acid and to predict their stereoselectivity at position 3 of the aldol adducts. The best biocatalysts were then proved to be strictly (3S)‐selective