A Two-Step, One-Pot Enzymatic Synthesis of 2-Substituted 1,3-Diols
摘要:
A biocatalytic cascade reaction was designed for the stereoselective synthesis of optically pure 2-alkyl-1,3-diols employing two enzymes. The cascade process consists of two consecutive steps: a stereoselective diketone reduction and a hydroxy ketone reduction. Chiral diols were formed by the addition of ketoreductases in the same vessel, in high stereoselectivity and chemical yield, without the isolation of the intermediate beta-hydroxy ketones.
Highly diastereoselective synthesis of 2-substituted-1,3-diols catalyzed by ketoreductases
作者:Dimitris Kalaitzakis、Ioulia Smonou
DOI:10.1016/j.tet.2010.09.096
日期:2010.11
The stereoselective reduction of alpha-substituted-beta-hydroxy ketones for the preparation of the corresponding optically pure 2-monosubstituted or 2-disubstituted-1,3-diols is described. These transformations proceed in high optical purities and yields. Ketoreductases were able to catalyze the formation of either the syn or the anti diol, depending on the enzyme. By replacing the a-alkyl substituent for an OAc moiety, in low conversion time (<= 24 h), ketoreductases catalyzed the formation of the OAc-protected 1,2,3-triol, in high yield and with high optical purity (>99% de, >99% ee). This is a simple and highly stereoselective method for the synthesis of different diastereomers of chiral diols. (C) 2010 Elsevier Ltd. All rights reserved.
A Two-Step, One-Pot Enzymatic Synthesis of 2-Substituted 1,3-Diols
作者:Dimitris Kalaitzakis、Ioulia Smonou
DOI:10.1021/jo101519t
日期:2010.12.17
A biocatalytic cascade reaction was designed for the stereoselective synthesis of optically pure 2-alkyl-1,3-diols employing two enzymes. The cascade process consists of two consecutive steps: a stereoselective diketone reduction and a hydroxy ketone reduction. Chiral diols were formed by the addition of ketoreductases in the same vessel, in high stereoselectivity and chemical yield, without the isolation of the intermediate beta-hydroxy ketones.