Tributyltin hydride when reacted with a series of substituted azoarenes afforded hydrazo compounds with high chemoselectivity and good to high yields. With ortho-substituted azoarenes, mixtures of hydrazo derivatives and N-heterocycles or cyclic products only were obtained. The kinetic law of the process was determined in the presence and in the absence of AIBN; with the radical initiator the reaction proceeds via a radical chain mechanism, whereas without AIBN the presence of stannyl free radicals could be discarded. The mechanism of the noninitiated reaction is discussed. EPR characterization of spin adducts obtained by reacting group IVB organometallic radicals with azo compounds is reported.
The oxidation of primaryaromaticamines to the corresponding azo derivatives has been observed in catalytic systems containing manganese(III) tetraphenylporphyrin and sodium periodate in the presence of heterocyclic nitrogen bases acting as axial ligands.
Cytochrome P-450 dependent monooxygenases model system: rapid and efficient oxidation of primary aromatic amines to azo derivatives with sodium periodate catalyzed by manganese(III) Schiff base complexes
Rapid and efficient oxidation of primary aromatic amines was investigated. Mn(III)-salophen catalyst can catalyze the oxidation of primary aromatic amines to azo derivatives with sodium periodate. The ability of various Schiff base complexes in this oxidation system was also investigated. (C) 2004 Elsevier Ltd. All rights reserved.
Indium-mediated one-pot reductive conversion of nitroarenes to N-arylacetamides
作者:Byeong Hyo Kim、Rongbi Han、Fengyu Piao、Young Moo Jun、Woonphil Baik、Byung Min Lee
DOI:10.1016/s0040-4039(02)02479-6
日期:2003.1
N-Arylacetamides were prepared in excellent yields from nitroarenes in the presence of acetic anhydride, acetic acid and indium by a one-pot procedure. (C) 2002 Elsevier Science Ltd. All rights reserved.
Mirkhani, Valiollah; Tangestaninejad, Shahram; Moghadam, Majid, Journal of Chemical Research - Part S, 2003, # 12, p. 792 - 794
Concise preparation of azenes by oxidation of aromatic amines with molecular oxygen in subcritical water
作者:Nermin Simsek Kus
DOI:10.1007/s00706-010-0381-6
日期:2010.10
organic substrates with molecularoxygen, the most abundant and accessible oxidant, has always been an attractive method for preparation of target molecules. In terms of green chemistry, non-metal-catalyzed oxidation of organic substrates is very attractive. This paper describes a general procedure for synthesis of azenes by oxidation of primary aromatic amines with molecularoxygen (3O2) in subcritical
摘要有机底物与分子氧(最丰富和可及的氧化剂)的反应一直是制备目标分子的一种有吸引力的方法。就绿色化学而言,有机基质的非金属催化氧化非常有吸引力。本文介绍了在亚临界水中通过分子氧(3 O 2)氧化伯芳族胺来合成氮杂的一般步骤。反应以中等至良好的产率提供了相应的氮杂。 图形概要