Convenient Preparation of Cycloalkenyl Boronic Acid Pinacol Esters
作者:Vivek Rauniyar、Huimin Zhai、Dennis G. Hall
DOI:10.1080/00397910802245762
日期:2008.10.28
Abstract A practical method for the preparation of cycloalkenyl boronic acid pinacol esters is described. These important synthetic intermediates are typically made using more expensive methods like transition metal-catalyzed borylation of alkenyl halides or triflates. In this work, they are obtained from the simple corresponding cycloalkanones, which are subjected to Shapiro reaction conditions followed
Photoactivation of Hydrazones for the Synthesis of Diarylalkanes and Trialkylmethylboronates: The Key Role Played by Soluble Base
作者:Po-Kai Peng、Clayton P. Donald、Zhencheng Dong、Jeremy A. May
DOI:10.1021/acs.orglett.4c00873
日期:2024.4.26
The synthesis of diaryl alkanes and tertiary organoboronates via Barluenga coupling at roomtemperature occurred via photoactivated conversion of aryl sulfonyl hydrazones to diazo compounds in the presence of soluble bases. The combination of arylsulfonyl hydrazone and a soluble base is necessary to provide a near-UV chromophore. Using aromatic hydrazones and aromaticboronicacids resulted in rapid