Dehydrogenative B−H/C(sp<sup>3</sup>
)−H Benzylic Borylation within the Coordination Sphere of Platinum(II)
作者:Colin M. Kelly、Jack T. Fuller、Casper M. Macaulay、Robert McDonald、Michael J. Ferguson、Steven M. Bischof、Orson L. Sydora、Daniel H. Ess、Mark Stradiotto、Laura Turculet
DOI:10.1002/anie.201700857
日期:2017.5.22
The first examples of stoichiometric dehydrogenative B-H/C(sp3 )-H benzylic borylation reactions, which are of relevance to catalytic methylarene (di)borylation, are reported. These unusual transformations involving a (κ2 -P,N)Pt(η3 -benzyl) complex, and either pinacolborane or catecholborane, proceed cleanly at room temperature. Density functional calculations suggest that borylation occurs via successive
报道了化学计量脱氢的BH / C(sp 3)-H苄基硼酸酯化反应的第一个实例,其与催化的甲基芳烃(di)硼酸酯化有关。这些涉及(κ异常变换2 -P,N)的Pt(η 3 -苄基)络合物,和任一频哪醇或儿茶酚,在室温下继续进行清洁。密度泛函计算表明,硼酸酯化是通过连续的σ键复分解步骤发生的,从而Pt II -H中间体参与C(sp 3)-H键活化诱导的脱氢反应。