Traceless directing group mediated branched selective alkenylation of unbiased arenes
作者:Soumitra Agasti、Aniruddha Dey、Debabrata Maiti
DOI:10.1039/c6cc07032a
日期:——
–COOH group assisted branched selective olefination of simple arenes.
–COOH基团辅助简单芳烃的分支选择性烯基化。
Visible-Light-Enabled Oxidative Coupling of Alkenes with Dialkylformamides To Access Unsaturated Amides
作者:Maojian Lu、Zhaowei Lin、Shanyi Chen、Hongyou Chen、Mingqiang Huang、Shunyou Cai
DOI:10.1021/acs.orglett.9b03870
日期:2019.12.20
A practical and direct method for oxidative cross-coupling of alkenes with dialkylformamides is established employing visible-light-enabled photoredox catalysis. This strategy allows efficient access to diverse unsaturated amides under mild reaction conditions. The application of an appropriate diaryliodonium salt was demonstrated to be critical to the success of this process. This catalyst system
Electrophilic Fluorophosphonium Cations in Frustrated Lewis Pair Hydrogen Activation and Catalytic Hydrogenation of Olefins
作者:Thorsten vom Stein、Manuel Peréz、Roman Dobrovetsky、Daniel Winkelhaus、Christopher B. Caputo、Douglas W. Stephan
DOI:10.1002/anie.201504109
日期:2015.8.24
phosphorus(V)‐based Lewis acids with diaryl amines and diaryl silylamines promotes reversible activation of dihydrogen and can be further exploited in metal‐free catalytic olefin hydrogenation. Combined experimental and density functional theory (DFT) studies suggest a frustrated Lewis pair type activation mechanism.
Metal-free oxidative cross-coupling of diazirines with arylboronic acids
作者:Guojiao Wu、Xia Zhao、Wenzhi Ji、Yan Zhang、Jianbo Wang
DOI:10.1039/c5cc08855k
日期:——
We report herein a metal-free cross-coupling of diazirines with arylboronic acids under oxidative conditions. The reaction affords a series of substituted olefins. It is proposed that the interaction between nitrogen...
Substituent Effects on the NMR Chemical Shifts of Aromatic Side Chain Protons. I. The Effects of<i>meta</i>-Substituents
作者:Hiroaki Yamada、Yuho Tsuno、Yasuhide Yukawa
DOI:10.1246/bcsj.43.1459
日期:1970.5
The Hammett type treatment of the chemicalshift of substituted aromatic side chain protons has not always been successful. The failure might be ascribed to the neglect of magnetic longrange effects. When the corrections were made both for the ring current diminution due to the contribution of polar resonance structure of the introduced substituent and for the substituent magnetic anisotropy effect