Issue 3, 2018

Stereospecific C–H activation as a key step for the asymmetric synthesis of various biologically active cyclopropanes

Abstract

A rapid and efficient synthesis of hoshinolactam, an enantiopure cyclopropane containing natural product, is described. This strategy is based on stereospecific C(sp3)–H activation via unprecedented olefination on the cyclopropane core. The use of a stereogenic and easily recyclable directing group (S)-2-(p-tolylsulfinyl)aniline (APS) which was originally developed by our group allows obtention of diastereomerically pure products in high yields. Optically pure cyclopropanes are subsequently converted into enantiomerically pure targeted natural products. Furthermore a closely related synthetic scenario is employed to build up precursors of grenadamide and cascarillic acid.

Graphical abstract: Stereospecific C–H activation as a key step for the asymmetric synthesis of various biologically active cyclopropanes

Supplementary files

Article information

Article type
Research Article
Submitted
18 aug 2017
Accepted
15 sep 2017
First published
19 sep 2017

Org. Chem. Front., 2018,5, 409-414

Stereospecific C–H activation as a key step for the asymmetric synthesis of various biologically active cyclopropanes

S. Jerhaoui, P. Poutrel, J.-P. Djukic, J. Wencel-Delord and F. Colobert, Org. Chem. Front., 2018, 5, 409 DOI: 10.1039/C7QO00737J

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