Synthesis of 2-Aminophenols and Heterocycles by Ru-Catalyzed C–H Mono- and Dihydroxylation
摘要:
A novel and efficient synthesis of 2-aminophenols, 2-aminobenzene-1,3-diols, and heterocycles through Ru-catalyzed C-H mono- and dihydroxylation of anilides has been developed with a new directing group strategy. The reaction demonstrates excellent reactivity, regioselectivity, good functional group tolerance, and high yields.
Synthesis of 2-Aminophenols and Heterocycles by Ru-Catalyzed C–H Mono- and Dihydroxylation
摘要:
A novel and efficient synthesis of 2-aminophenols, 2-aminobenzene-1,3-diols, and heterocycles through Ru-catalyzed C-H mono- and dihydroxylation of anilides has been developed with a new directing group strategy. The reaction demonstrates excellent reactivity, regioselectivity, good functional group tolerance, and high yields.
Mixing <i>O</i>-Containing and <i>N</i>-Containing Directing Groups for C–H Activation: A Strategy for the Synthesis of Highly Functionalized 2,2′-Biaryls
N-containing directing groups has been developed for the synthesis of 2,2′-biaryl via Pd-mediated C–Hbond activation and oxidative coupling. This new transformation may proceed through a mechanism involving Pd(II) and Pd(IV) intermediates. We found the use of PTSA and HFIP to be critical for the reaction and suggest that these reagents could serve as efficient ligands for this C–Cbond formation. This
Ceric Ammonium Nitrate Promoted Highly Chemo‐ and Regioselective o
<i>rtho</i>
‐Nitration of Anilines under Mild Conditions
作者:Zafar Iqbal、Asha Joshi、Saroj Ranjan De
DOI:10.1002/ejoc.202200746
日期:2022.8.19
practical strategy for cericammoniumnitrate promoted highly chemo- and regioselective ortho-nitration of aniline carbamates has been developed under mild and neutral conditions without the requirement of additional catalyst and oxidant. Both electron rich and highly electron-deficient anilines afforded good to excellent yields of the desired products with outstanding functional groups tolerance.
AbstractAn in situ generated cationic ruthenium(II) catalyst allowed for robust CH arylations of anilides with boronic acids. The optimized ruthenium catalyst was found to be both site selective and chemoselective, thereby providing the monoarylated products in excellent yields with ample substrate scope. The catalyst’s high efficacy furthermore set the stage for efficient CH arylations with borinic acids as well as potassium trifluoroborates.magnified image
Synthesis of 2-Aminophenols and Heterocycles by Ru-Catalyzed C–H Mono- and Dihydroxylation
作者:Xinglin Yang、Gang Shan、Yu Rao
DOI:10.1021/ol400437a
日期:2013.5.17
A novel and efficient synthesis of 2-aminophenols, 2-aminobenzene-1,3-diols, and heterocycles through Ru-catalyzed C-H mono- and dihydroxylation of anilides has been developed with a new directing group strategy. The reaction demonstrates excellent reactivity, regioselectivity, good functional group tolerance, and high yields.