Stereodivergent Synthesis of 3‐Hydroxyprolines and 3‐Hydroxypipecolic Acids via Ketoreductase‐Catalyzed Dynamic Kinetic Reduction
作者:Christopher K. Prier、Michael M.‐C. Lo、Hongming Li、Nobuyoshi Yasuda
DOI:10.1002/adsc.201900871
日期:2019.11.19
for the stereoselective synthesis of hydroxylated cyclic amino acids. Using ketoreductases, cyclic ketoesters are converted with high diastereo‐ and enantioselectivity to all isomers of 3‐hydroxyproline and 3‐hydroxypipecolic acid via a dynamic kinetic reduction reaction. This work highlights the ability of enzymes to provide solutions to challenges in stereoselective synthesis.
A highly practicable synthesis of both enantiomers of 3-hydroxypipecolic acid derivatives 1, 2, 3, 4 is described. Screening of these molecules for glycosidase inhibition has been examined. Compound 3 was shown to be a potent inhibitor of beta-N-acetylglucosaminidase as well as Escherichia coli beta-glucuronidase. (C) 2008 Elsevier Ltd. All rights reserved.
Synthesis of both enantiomers of hydroxypipecolic acid derivatives equivalent to 5-azapyranuronic acids and evaluation of their inhibitory activities against glycosidases
kinetic resolution, the synthesis of both L- and D-isomers of 3,4,5-trihydroxy- and 3-hydroxypipecolic acids was achieved. None of the compounds tested showed inhibitory activity against alpha- and beta-glucosidases. On the other hand, L-23 and L-29 were found to have potent inhibitory activity against beta-glucuronidase. In addition, it is interesting that some uronic-type azasugar derivatives showed moderate