Nickel-Catalyzed Direct Synthesis of Aryl Olefins from Ketones and Organoboron Reagents under Neutral Conditions
作者:Chuanhu Lei、Yong Jie Yip、Jianrong Steve Zhou
DOI:10.1021/jacs.7b02742
日期:2017.5.3
Nickel-catalyzed addition of arylboron reagents to ketones results in aryl olefins directly. The neutral condition allows acidic protons of alcohols, phenols, and malonates to be present, and fragile structures are also tolerated.
Chiral Bicyclo[2.2.2]octane‐Fused CpRh Complexes: Synthesis and Potential Use in Asymmetric C−H Activation
作者:Guozhu Li、Xiaoqiang Yan、Jijun Jiang、Hao Liang、Chao Zhou、Jun Wang
DOI:10.1002/anie.202010489
日期:2020.12.7
A new class of chiral cyclopentadienyl rhodium(I) complexes (CpRhI) bearing C2‐symmetric chiral bridged‐ring‐fused Cp ligands was prepared. The complexes were successfully applied to the asymmetric C−H activation reaction of N‐methoxybenzamides with quinones, affording a series of chiral hydrophenanthridinones in up to 82 % yield with up to 99 % ee. Interestingly, structure analysis reveals that the
Photoinduced electron-transfer (PET) reactions of 1,4-diphenyl-2,3-diazabicyclo[2.2.2]oct-2-ene 1 result in a quantitative formation of 2,5-diphenylhexa-1,5-diene 2, in sharp contrast to the results of non-PET reactions and showing the importance of a back electron-transfer (BET) process in PET reactions.
1,4-二苯基-2,3-二氮杂双环[2.2.2]辛-2-烯 1 的光诱导电子转移(PET)反应可定量生成 2,5-二苯基六-1,5-二烯 2,这与非 PET 反应的结果形成了鲜明对比,并显示了反向电子转移(BET)过程在 PET 反应中的重要性。