Efficient Synthesis of Diborylalkenes from Alkenes and Diboron by a New PSiP-Pincer Palladium-Catalyzed Dehydrogenative Borylation
作者:Jun Takaya、Naohiro Kirai、Nobuharu Iwasawa
DOI:10.1021/ja205186k
日期:2011.8.24
as 1,1-, trans-1,2-, and cyclic 1,2-diborylalkenes from alkenes and diboron was achieved for the first time. Selective preparation of di- and monoborylalkenes was also realized by the appropriate choice of reaction conditions. The reaction was found to proceed via a new mechanism of dehydrogenative borylation through a monoborylpalladium complex bearing an anionic PSiP-pincer ligand as a key intermediate
首次实现了以烯烃和二硼为原料高效合成1,1-、反式-1,2-和环状1,2-二硼基烯烃等多种二硼基烯烃。Selective preparation of di- and monoborylalkenes was also realized by the appropriate choice of reaction conditions. 发现该反应通过一种新的脱氢硼化机制进行,以带有阴离子PSiP-钳状配体的单硼基钯配合物为关键中间体,实现了有效的硼化而不牺牲烯烃的硼氢化或氢化。