Rhodium(III)-catalyzed coupling of aromatic ketazines or oximes with 2-vinyloxirane via C–H activation
摘要:
Described herein is a rhodium(III)-catalyzed coupling of aromatic ketazines or oximes with 2-vinyloxirane via directed C-H activation. This reaction proceeds efficiently under mild conditions with a low catalyst loading, especially in conditions with room temperature in the absence of additives for aromatic ketazines. A wide range of substituted substrates is supported and a possible mechanism is proposed according to the experimental results of kinetic isotopic effect, reversibility studies, and catalysis with rhodacycle intermediate c1. (C) 2015 Elsevier Ltd. All rights reserved.
Direct one-potsynthesis of ketazines from secondary alcohols and hydrazinehydrate catalyzed by a ruthenium pincer complex is reported, which proceeds through O–H bond activation of secondary alcohols via amine–amide metal–ligand cooperation in the catalyst. Remarkably, liberated molecular hydrogen and water are the only byproducts.
GRADBERG I. I.; YAKUSHCHENKO I. K.; DMITRIEV L. B., ZH. ORGAN. XIMII, 1979, 15, HO 1, 89-95
作者:GRADBERG I. I.、 YAKUSHCHENKO I. K.、 DMITRIEV L. B.
DOI:——
日期:——
Rhodium(III)-catalyzed coupling of aromatic ketazines or oximes with 2-vinyloxirane via C–H activation
作者:Jing Wen、An Wu、Yuqin Miao、Jin Zhu
DOI:10.1016/j.tetlet.2015.08.025
日期:2015.10
Described herein is a rhodium(III)-catalyzed coupling of aromatic ketazines or oximes with 2-vinyloxirane via directed C-H activation. This reaction proceeds efficiently under mild conditions with a low catalyst loading, especially in conditions with room temperature in the absence of additives for aromatic ketazines. A wide range of substituted substrates is supported and a possible mechanism is proposed according to the experimental results of kinetic isotopic effect, reversibility studies, and catalysis with rhodacycle intermediate c1. (C) 2015 Elsevier Ltd. All rights reserved.
BRAUN, D.;JAKOBI, R., MONATSH. CHEM., 1982, 113, N 12, 1403-1414