The Liquid-phase Oxidation of Methylbenzenes by the Cobalt-Copper-Bromide System
作者:Toshihiko Okada、Yoshio Kamiya
DOI:10.1246/bcsj.54.2724
日期:1981.9
The liquid-phase oxidation of methylbenzenes catalyzed by a catalyst system composed of cobalt(II) and copper(II) acetates and sodium bromide was carried out in acetic acid at 150 °C. The corresponding benzyl acetates and benzaldehydes were obtained in high selectivities in most cases. A nuclear-brominated product, i.e., 3-bromo-4-methoxytoluene was also obtained in the oxidation of p-methoxytoluene
由乙酸钴(II)和乙酸铜(II)和溴化钠组成的催化剂体系催化甲基苯的液相氧化,在乙酸中于 150 °C 下进行。在大多数情况下,以高选择性获得相应的乙酸苄酯和苯甲醛。在对甲氧基甲苯的氧化中也得到核溴化产物,即3-溴-4-甲氧基甲苯,其具有两个不同的反应位点,即供电子甲氧基取代基的邻位和苄基位。然而,在催化剂体系中溴离子取代乙酸根离子对侧链氧化产物具有令人满意的选择性。在对二甲苯氧化中,还得到了α,α'-二乙酰氧基-对二甲苯和对(乙酰氧基甲基)苯甲酸,以及对甲基乙酸苄酯,虽然他们的金额很小。还进行了多甲基苯的氧化。
Electron-transfer chain catalysis of substitution reactions. Experimental evidence for the S<sub>ON</sub>2 mechanism
作者:Lennart Eberson、Lennart Jönsson
DOI:10.1039/c39800001187
日期:——
Two possible cases of an oxidative electron-transfer chain catalysis mechanism, the SON2 mechanism, are presented: the anodic ‘oxidation’ of 4-fluoroanisole in the presence of acetate ion to give 4-acetoxyanisole, and the CuIII‘oxidation’ of chloro- and fluoro-benzene in the presence of water to give phenol.
介绍了氧化电子转移链催化机理的两种可能的情况,即S ON 2机理:在乙酸根离子存在下4-氟茴香醚的阳极“氧化”生成4-乙酰氧基苯甲醚,以及Cu III “氧化”在水的存在下,加入氯苯和氟苯,得到苯酚。
SUBSTITUTED IMIDAZOLES
申请人:CHUBB NATHAN ANTHONY LOGAN
公开号:US20070167506A1
公开(公告)日:2007-07-19
This invention relates to a range of alpha substituted 2-benzyl substituted imidazole compounds and pharmaceutically acceptable salts and solvates thereof, to compositions comprising such compounds, processes for their synthesis and their use as parasiticides.
Process for producing organic compounds using nitrites
申请人:——
公开号:US20030171618A1
公开(公告)日:2003-09-11
A process produces an organic compound by allowing (A) a compound capable of generating a free radical to react with (B) at least one of esters and salts of nitrous acid in the presence of a nitrogen-containing cyclic compound constitutively having a skeleton represented by following Formula (i) in its ring:
1
wherein X is an oxygen atom or an —OR group, and wherein R is a hydrogen atom or a hydroxyl-protecting group. Examples of the nitrogen-containing cyclic compound are cyclic imide compounds having a cyclic imide skeleton represented by following Formula (I):
2
wherein n is 0 or 1; X is an oxygen atom or an —OR group, and wherein R is a hydrogen atom or a hydroxyl-protecting group.
The aim of the present invention is to provide a multi-branched polymer, in which branch terminals can be easily modified and which have a high degree of branching and narrow dispersion. By polymerizing a compound having 2 or more polymerization-initiation sites and polymerizable unsaturated bonds with a living radical polymerization method using a metal catalyst, it is possible to produce a multi-branched polymer with narrow dispersion and a high degree of branching and having repeating units represented by the formula (I):
wherein R
1
to R
3
each independently represents hydrogen or a hydrocarbon group, R
1
may be bonded to R
3
to form a ring; X represents a connecting group having a valence of 3 or higher; Y may be the same or different and each represents a functional group which may have a halogen atom at a terminal thereof; and a is an integer of 2 or larger.