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Enantioselective Suzuki cross-coupling of 1,2-diboryl cyclopropanes†
Javier Teresa,Marina Velado,Roberto Fernández de la Pradilla,Alma Viso,Blanca Lozano
Chemical Science Pub Date : 01/13/2023 00:00:00 , DOI:10.1039/D2SC05789A
Abstract

Herein, we describe the catalytic enantioselective cross-coupling of 1,2-bisboronic esters. Prior work on group specific cross coupling is limited to the use of geminal bis-boronates. This desymmetrization provides a novel approach to prepare enantioenriched cyclopropyl boronates with three contiguous stereocenters, that could be further derivatized through selective functionalization of the carbon–boron bond. Our results suggest that transmetallation, which is the enantiodetermining step, takes place with retention of stereochemistry at carbon.

Graphical abstract: Enantioselective Suzuki cross-coupling of 1,2-diboryl cyclopropanes
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