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
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。