Suzuki–Miyaura coupling of nonbenzylic α‐(acylamino)alkylboron compounds with aryl halides is established. A Pd/PCy2Ph catalyst promotes the reaction efficiently at 145 °C. The reaction of enantioenriched α‐(acylamino)alkylboron compounds affords chiral 1‐arylalkylamides in high enantiospecificity and inversion of configuration.
Straightforward synthesis of chiral non-racemic α-boryl isocyanides
作者:Francesco Fini、Alessandro Zanni、Maria Luisa Introvigne、Mattia Stucchi、Emilia Caselli、Fabio Prati
DOI:10.1039/d1ob00616a
日期:——
A straightforward concise synthesis of chiral non-racemic aliphatic α-boryl isocyanides, relay intermediates for boron-based bioactive molecules in multicomponent reactions, is presented. The short synthetic sequence comprises as key steps copper-catalysed asymmetric borylation of imines, simultaneous nitrogen formylation/boron-protecting group interconversion and the final formamide dehydration reaction
Asymmetric Synthesis of Protected α-Amino Boronic Acid Derivatives with an Air- and Moisture-Stable Cu(II) Catalyst
作者:Andrew W. Buesking、Vlad Bacauanu、Irene Cai、Jonathan A. Ellman
DOI:10.1021/jo500300t
日期:2014.4.18
access to synthetically useful and pharmaceutically relevant α-amino boronic acid derivatives. The Cu(II)-catalyzed reaction is performed on the benchtop in air at room temperature using commercially available, inexpensive reagents at low catalyst loadings. A variety of N-tert-butanesulfinyl imines, including ketimines, react readily to provide α-sulfinamido boronate esters in good yields and with