报道了一种通过配体控制的 O-to-C 异构化制备未季铵化 C 结合硼烯醇化物的通用和简便方法。使用该协议,首次以纯形式分离了 C 结合的频哪醇烯醇化物,并通过核磁共振光谱和 X 射线晶体学进行了充分表征。与一般看法相反,这种 C-硼烯醇化物是稳定的,在硼处没有配位饱和。此外,C-硼烯醇化物呈现出与O-硼烯醇化物不同的反应性,并且证明了它们在CO和CC键形成中的应用。
Hydroboration and Diboration of Internal Alkynes Catalyzed by a Well-Defined Low-Valent Cobalt Catalyst
作者:Laura Ferrand、Ye Lyu、Alejandro Rivera-Hernández、Brendan Fallon、Muriel Amatore、Corinne Aubert、Marc Petit
DOI:10.1055/s-0036-1588996
日期:2017.9
stereoselective hydroboration of internal alkynes is reported. Extension to the diboration of internal alkynes is also related using the same reaction conditions. The use of a simple well-defined low-valent cobalt(I) catalyst [HCo(PMe3)4] capable of performing the regio- and stereoselective hydroboration of internal alkynes is reported. Extension to the diboration of internal alkynes is also related using the same
Synthesis and Applications of Unquaternized C-Bound Boron Enolates
作者:Elvis Wang Hei Ng、Kam-Hung Low、Pauline Chiu
DOI:10.1021/jacs.8b00614
日期:2018.3.14
boron enolates by a ligand-controlled O-to-C isomerization is reported. Using this protocol, C-bound pinacolboron enolates have been isolated in pure form for the first time, and have been fully characterized by NMR spectroscopy and X-ray crystallography. In contrast to the general perception, such C-boron enolates are stable without coordinative saturation at the boron. Moreover, C-boron enolates present
报道了一种通过配体控制的 O-to-C 异构化制备未季铵化 C 结合硼烯醇化物的通用和简便方法。使用该协议,首次以纯形式分离了 C 结合的频哪醇烯醇化物,并通过核磁共振光谱和 X 射线晶体学进行了充分表征。与一般看法相反,这种 C-硼烯醇化物是稳定的,在硼处没有配位饱和。此外,C-硼烯醇化物呈现出与O-硼烯醇化物不同的反应性,并且证明了它们在CO和CC键形成中的应用。