Chromium-Catalyzed Selective Dimerization/Hydroboration of Allenes to Access Boryl-Functionalized Skipped (E,Z)-Dienes

被引：23
作者：
Zhao, Yinsong [1 ]
Ge, Shaozhong [1 ]
机构：
[1] Natl Univ Singapore, Dept Chem, 3 Sci Dr 3, Singapore 117543, Singapore
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 04期
关键词：
allenes; chromium; dimerization; homogeneous catalysis; hydroboration; STEREOSELECTIVE-SYNTHESIS; STRUCTURE ELUCIDATION; TRANSITION-METALS; ETHYLENE; CYCLOADDITIONS; DIMERIZATION; ALLYLATION; TRANSFORMATIONS; POLYMERIZATION; HYDROBORATION;
D O I：
10.1002/anie.202012344
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A chromium-catalyzed dimerization/hydroboration of allenes is developed to access synthetically versatile boryl-functionalized skipped dienes with a catalyst generated in situ from CrCl2 and a pyridine-2,6-diimine ligand (PDI)-P-mes. A variety of allenes reacted with pinacolborane (HBpin) to afford the corresponding boryl-functionalized (E,Z)-1,4-dienes in high yields and with excellent selectivity. Electron paramagnetic resonance (EPR) spectroscopic studies suggest that this chromium-catalyzed reaction probably proceeds through a chromium(I) hydride intermediate.
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收藏
页码：2149 / 2154
页数：6
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