Copper-Catalyzed Dihydroquinolinone Synthesis from Isocyanides and <i>O</i>-Benzoyl Hydroxylamines
作者:Zhen Yang、Kun Jiang、Ying-Chun Chen、Ye Wei
DOI:10.1021/acs.joc.9b00262
日期:2019.3.15
A copper-catalyzed protocol has been realized for the rapid assembly of dihydroquinolinones from readily accessible isocyanides and O-benzoyl hydroxylamines. The reactions (10 mol % of CuOAc, 10 mol % of dppe, 3 equiv of PhONa, 30 °C) deliver various structurally interesting dihydroquinolinones in moderate to good yields (up to 76%). The reactions may proceed in a cascade manner involving isocyanide
N-benzoate alkylamines were used as the aminating agents, a efficient Rh-catalyzed ortho CH amination of 2-arylquinazolin-4(3H)-one has been reported. The reactions exhibit high efficient and good functional group tolerance. Exclusive 2,6-bis-aminated product and good to excellent yields were obtained under mild reaction conditions.
An HFIP-assisted, cobalt-catalyzed three-component electrophilic C–H amination/cyclization/directing group removal cascade to naphtho[1,2-d]imidazoles
作者:Hasina Mamataj Begam、Kangkan Pradhan、Kasarla Varalaxmi、Ranjan Jana
DOI:10.1039/d3cc00749a
日期:——
A concise and efficient method has been developed herein for the synthesis of valuable naphtho[1,2-d]imidazole derivatives. It involves an earth-abundant cobalt-catalyzed electrophilic ortho C–H amination/cyclization/directing group removal cascade with O-benzoloxyamines using paraformaldehyde as a one carbon synthon. Picolinamide has been utilized as a traceless directing group. A boosting effect
The present disclosure provides, in part, compounds having allosteric effector properties against Hepatitis B virus Cp. Also provided herein are methods of treating viral infections, such as hepatitis B, comprising administering to a patient in need thereof a disclosed compound.
Transition-Metal-Free Electrophilic Amination of Arylboroxines
作者:Qing Xiao、Leiming Tian、Renchang Tan、Ying Xia、Di Qiu、Yan Zhang、Jianbo Wang
DOI:10.1021/ol301912a
日期:2012.8.17
A transition-metal-free strategy to construct C(sp(2))-N bonds using arylboroxines and O-benzoyl hydroxylamines as coupling partners has been developed. This transformation provides a useful method to access various aromatic amines.