iScience (Aug 2021)

Regiodivergent and stereoselective hydroxyazidation of alkenes by biocatalytic cascades

  • Jing-Fei Wu,
  • Nan-Wei Wan,
  • Ying-Na Li,
  • Qing-Ping Wang,
  • Bao-Dong Cui,
  • Wen-Yong Han,
  • Yong-Zheng Chen

Journal volume & issue
Vol. 24, no. 8
p. 102883

Abstract

Read online

Summary: Asymmetric functionalization of alkenes allows the direct synthesis of a wide range of chiral compounds. Vicinal hydroxyazidation of alkenes provides a desirable path to 1,2-azidoalcohols; however, existing methods are limited by the control of stereoselectivity and regioselectivity. Herein, we describe a dual-enzyme cascade strategy for regiodivergent and stereoselective hydroxyazidation of alkenes, affording various enantiomerically pure 1,2-azidoalcohols. The biocatalytic cascade process is designed by combining styrene monooxygenase-catalyzed asymmetric epoxidation of alkenes and halohydrin dehalogenase-catalyzed regioselective ring opening of epoxides with azide. Additionally, a one-pot chemo-enzymatic route to chiral β-hydroxytriazoles from alkenes is developed via combining the biocatalytic cascades and Cu-catalyzed azide-alkyne cycloaddition.

Keywords