Using bis(pinacolato)diboron, catalytic amounts of CuII, and various amine bases in water under atmospheric conditions at rt, acyclic and cyclic α,β-unsaturated ketones and esters are β-borylated in up to 98% yield. Mechanistic investigations using UV–vis spectroscopy, 11B NMR, and solvent kinetic isotope effect suggest that the role of the amine is not only to coordinate to CuII but also to activate
                                    使用双(
频哪醇)二
硼,在室温和室温下于室温下催化量的Cu II和各种胺碱在
水中,无环和环状的α,β-不饱和酮和酯的β-
硼化反应,产率最高可达98%。使用紫外可见光谱,11 B NMR和溶剂动力学同位素效应的机理研究表明,胺的作用不仅是与Cu II配位,而且还可以激活亲核
水分子以形成反应性sp 2 –sp 3
硼。复杂的。