Direct arylation of tertiary amines via aryne intermediates using diaryliodonium salts
作者:Zhiang Zhang、Xunshen Wu、Jianwei Han、Wenjun Wu、Limin Wang
DOI:10.1016/j.tetlet.2018.03.067
日期:2018.5
With a strategy by usingdiaryliodoniumsalts as the precursors of benzynes, direct N-arylation of tertiary amines with diaryliodoniumsalts was reported. Thus, the desired aromatic tertiary amines with a wide range of substituents were synthesized in moderate to excellent yields of 55–91%.
Nucleophilicity Parameters of Stabilized Iodonium Ylides for Characterizing Their Synthetic Potential
作者:Saloua Chelli、Konstantin Troshin、Peter Mayer、Sami Lakhdar、Armin R. Ofial、Herbert Mayr
DOI:10.1021/jacs.6b05768
日期:2016.8.17
follow the linear free energy relationship log k(20 °C) = sN(N + E) (eq 1), where electrophiles are characterized by one parameter (E), while nucleophiles are characterized by two parameters: the nucleophilicityN and the susceptibility sN. The nucleophilicity parameters 4 < N < 8 for iodonium ylides 1(a-d) derived from these correlations show that substituting hydrogen for Ph-I(+) at the carbanionic
Solvent-free mechanochemical Buchwald-Hartwig amination of aryl chlorides without inert gas protection
作者:Qiao-Ling Shao、Zhi-Jiang Jiang、Wei-Ke Su
DOI:10.1016/j.tetlet.2018.04.078
日期:2018.6
A solvent-free Buchwald-Hartwig amination had been developed under high-speed ball-milling conditions, which afforded the desired products with moderate to high yields. The addition of sodium sulfate was found to be crucial for improving both the performance and the reproducibility. Comparative solvent-free stirring experiments implicated the importance of mechanical interaction for the transformation
Substituted benzimidazoles and imidazo-[4,5]-pyridines
申请人:——
公开号:US20040214857A1
公开(公告)日:2004-10-28
2-Aryl substituted benzimidazoles and imidazo[4,5]pyridines are disclosed as inhibitors of Cds1 and useful as adjuvants to chemotherapy or radiation therapy in the treatment of cancer.