Stereospecific Palladium‐Catalyzed Acylation of Enantioenriched Alkylcarbastannatranes: A General Alternative to Asymmetric Enolate Reactions
作者:Chao‐Yuan Wang、Glenn Ralph、Joseph Derosa、Mark R. Biscoe
DOI:10.1002/anie.201609930
日期:2017.1.16
We report the development of a Pd‐catalyzed process for the crosscoupling of unactivated primary, secondary, and tertiary alkylcarbastannatrane nucleophiles with acyl electrophiles. Reactions involving optically active alkylcarbastannatranes occur with exceptional stereofidelity and with net retention of absolute configuration. Because the stereochemistry of the resulting products is entirely reagent‐controlled
Ligand-Free Copper(I)-Mediated Cross-Coupling Reactions of Organostannanes with Sulfur Electrophiles
作者:Feng Zhu、Zhenhao Chen、Maciej A. Walczak
DOI:10.1021/acs.joc.0c01399
日期:2020.9.18
the cross-coupling of C–S bond is a highly attractive area of research due to the prevalence of aryl thioether in bioactive natural products, functional materials, agrochemicals, and pharmaceutically active compounds. Herein, we report a ligand-free Cu(I) mediated electrophilic thiolation of organostannanes with sulfur electrophiles. A selective transfer of alkyl groups was achieved in reactions with