Ligandless Copper-Catalyzed β-Boration of α,β-Unsaturated Compounds in Aqueous Solution
作者:Hee-Sung Chea、Hak-Suk Sim、Jae-Sook Yun
DOI:10.5012/bkcs.2010.31.03.551
日期:2010.3.20
water as a co-solvent and a reaction promoter exerted a positive effect on catalytic efficiency and resulted in the efficient β-boration of α,β-unsaturated carbonyl compounds including substituted enones and esters. This new, operationally simple method is useful for the preparation of racemic organoboron compounds.Our investigation of the boration reaction under ligand-free conditions began with β-monosubstituted
然而,该协议显示了有限的底物范围,因为反应仅在 α 和 β 位置没有取代基的简单底物中完成。需要在金属催化剂上没有特定配位体的高效催化。在此,我们报告了一种无配体方案,用于在 THF 水溶液中铜催化的 α-不饱和羰基化合物的 β-硼化。使用水作为助溶剂和反应促进剂对催化效率产生积极影响,并导致 α,β-不饱和羰基化合物(包括取代的烯酮和酯)的有效 β-硼化。这种新的、操作简单的方法可用于制备外消旋有机硼化合物。