stereoconvergent borylative cyclization of ω-mesylate-α,β-unsaturated compounds is facilitated by a simple Cu-bisphosphine catalyst. This reaction provides a novel route to cis-β-boron-substituted five- and six-membered carbocycle and heterocycle esters. Mechanistic studies indicate that stereoconvergence and cis-substitution likely stem from the rapid enolation of the borylcopper adduct with the substrate
简单的Cu-
双膦催化剂可促进Cu(I)催化ω-
甲磺酸酯-α,β-不饱和化合物的立体收敛性
硼烷基化环化。该反应提供了一种顺式-β-
硼取代的五元和六元碳环和杂环酯的新颖途径。机理研究表明,立体收敛和顺式取代可能分别源于
硼铜铜加合物与底物双键的快速烯醇化和五元中间体的形成。