Chromium‐Catalyzed Selective Dimerization/Hydroboration of Allenes to Access Boryl‐Functionalized Skipped (E,Z)‐Dienes,Angewandte Chemie International Edition

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Chromium‐Catalyzed Selective Dimerization/Hydroboration of Allenes to Access Boryl‐Functionalized Skipped (E,Z)‐Dienes
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-10-07 , DOI: 10.1002/anie.202012344
Yinsong Zhao ₁ , Shaozhong Ge ₂

Affiliation

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 ^mesPDI. 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.

中文翻译：

苯丙氨酸的铬催化选择性二聚/氢硼化反应，获得硼烷基官能化的跳过的（E，Z）-二烯

开发了铬催化的异戊二烯二聚/氢硼化反应，以利用由CrCl ₂和吡啶-2,6-二亚胺配体^mes PDI合成的多用途硼基官能化跳过二烯。多种异戊烯与频哪醇硼烷（HBpin）反应，以高收率和优异的选择性提供相应的经硼基官能化的（E，Z）-1,4-二烯。电子顺磁共振（EPR）光谱研究表明，这种铬催化的反应可能通过氢化铬（I）中间体进行。

更新日期：2020-10-07

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