Selective Oxidative Homo- and Cross-Coupling of Phenols with Aerobic Catalysts
摘要:
Simple catalysts that use atom-economical oxygen as the terminal oxidant to accomplish selective ortho-ortho, ortho-para, or para-para homo-couplings of phenols are described. In addition, chromium salen catalysts have been discovered as uniquely effective in the cross-coupling of different phenols with high chemo- and regioselectivity.
Selective cine Substitution of 1-Arylethenyl Acetates with Arylboron Reagents and a Diene/Rhodium Catalyst
作者:Jung-Yi Yu、Ryosuke Shimizu、Ryoichi Kuwano
DOI:10.1002/anie.201002745
日期:2010.8.23
When the crowd says Bo: A carbon–carbon bond is selectively formed at the β position of 1‐arylethenyl acetate when the alkenyl substrate is reacted with arylboronic acids in the presence of a cycloocta‐1,5‐diene/rhodiumcatalyst. The choice of the ligand is crucial for the unusual cinesubstitution.
Wulff, Guenter; Stellbrink, Heike, Recueil des Travaux Chimiques des Pays-Bas, 1990, vol. 109, # 3, p. 216 - 221
作者:Wulff, Guenter、Stellbrink, Heike
DOI:——
日期:——
Selective Oxidative Homo- and Cross-Coupling of Phenols with Aerobic Catalysts
作者:Young Eun Lee、Trung Cao、Carilyn Torruellas、Marisa C. Kozlowski
DOI:10.1021/ja500183z
日期:2014.5.14
Simple catalysts that use atom-economical oxygen as the terminal oxidant to accomplish selective ortho-ortho, ortho-para, or para-para homo-couplings of phenols are described. In addition, chromium salen catalysts have been discovered as uniquely effective in the cross-coupling of different phenols with high chemo- and regioselectivity.
A ratiometric fluorescent probe for fluoride ions with a tridentate receptor of boronic acid and imidazolium
作者:Eun Jin Jun、Zhaochao Xu、Minji Lee、Juyoung Yoon
DOI:10.1016/j.tetlet.2013.02.112
日期:2013.5
new ratiometric fluorescent probe for fluorideions was developed which complexed fluoride by a tridentate receptor of boronicacid and imidazolium. In the current study, a tridentate receptor 1 with one ortho boronicacid and two imidazoliumgroups was designed. The boron center can co-operate with imidazolium to bind F−. The formation of B–F complex stabilizes the interaction between fluoride and