Preparation of aromatic and heteroaromatic carboxylic acids by catalytic ozonolysis
申请人:——
公开号:US20030216577A1
公开(公告)日:2003-11-20
A process for catalytically oxidizing alkylaromatic compounds of the formula (I)
Ar—CH
2
—R
where Ar is an optionally substituted, aromatic or heteroaromatic 5-membered or 6-membered ring or a ring system having up to 20 carbon atoms where Ar may optionally be fused to a C
1
-C
6
-alkyl group in which up to 2 carbon atoms may be replaced by a heteroatom, and R is hydrogen, phenyl, benzyl or heteroaryl, where the phenyl, benzyl or heteroaryl radicals may also be joined to Ar by a bridge, or R together with Ar forms an optionally substituted ring system which may contain one or more optionally substituted heteroatoms, to the corresponding aromatic or heteroaromatic carboxylic acids in a solvent with ozone in the presence of a transition metal catalyst and optionally in the presence of an acid at a temperature between −70° C. and 110° C. to the corresponding carboxylic acid.
Remote stereocontrol using rotationally restricted amides: (1,5)-asymmetric induction
作者:Jonathan Clayden、Megan Darbyshire、Jennifer H. Pink、Neil Westlund、Francis X. Wilson
DOI:10.1016/s0040-4039(97)10289-1
日期:1997.12
The stereochemical influence of a rotationallyrestricted amide group extends widely across substituted aromatic amides. Stereogenic centres can be created with high levels of (1,5)-stereocontrol when electrophiles are added to the enolates of 2-ketonaphthamides or to lithiated 2-alkylnaphthamides. Sequential double lateral lithiation of 2,6-dialkylbenzamides can lead to compounds containing (1,5)
Verfahren zur Herrstellung von aromatischen und heteroaromatischen Carbonsäuren durch katalytische Ozonolyse
申请人:DSM Fine Chemicals Austria Nfg GmbH & Co KG
公开号:EP1362840A1
公开(公告)日:2003-11-19
Verfahren zur katalytischen Oxidation von alkylaromatischen Verbindungen der Formel (I)
Ar-CH3
in der Ar einen gegebenenfalls substituierten, aromatischen oder heteroaromatischen 5er- oder 6er-Ring oder ein Ringsystem mit bis zu 20 C-Atomen bedeutet, wobei Ar gegebenenfalls mit einer C1-C6-Alkylgruppe, bei der bis zu 2 C-Atome durch ein Heteroatom ersetzt werden können, anelliert sein kann,
zu den korrespondierenden aromatischen oder heteroaromatischen Carbonsäuren, in einem Lösungsmittel mit Ozon in Gegenwart eines Übergangsmetallkatalysators und gegebenenfalls in Gegenwart einer Säure bei einer Temperatur zwischen - 70 °C und +70°C.
式(I)烷基芳香族化合物的催化氧化工艺
Ar-CH3
其中 Ar 表示任选取代的芳香族或杂芳族 5 或 6 元环或最多有 20 个碳原子的环系,其中 Ar 可任选与 C1-C6 烷基融合,其中最多有 2 个碳原子可被杂原子取代、
在有过渡金属催化剂存在的情况下,也可选择在有酸存在的情况下,在-70°C 至 +70°C的温度下,在有臭氧存在的溶剂中,与相应的芳香族或杂芳香族羧酸反应。
Provided are: a stabilizer composition capable of imparting a vinyl chloride resin with excellent thermal stability, coloration resistance, and thermal coloration resistance; a vinyl chloride resin composition containing the same; and a molded article of the composition. The stabilizer composition contains, with respect to 100 parts by mass of a component (A): 5 to 700 parts by mass of a component (B); and 5 to 200 parts by mass of a component (C). The component (A) is at least one organic acid zinc salt, the component (B) is at least one selected from the group consisting of organic acid barium salts, overbased barium carbonates, organic acid calcium salts and overbased calcium carbonates, and the component (C) is at least one hindered amine-based light stabilizer.
STABILIZING AGENT COMPOSITION, VINYL CHLORIDE RESIN COMPOSITION CONTAINING SAME AND MOLDED BODY THEREOF
申请人:ADEKA CORPORATION
公开号:EP3922699A1
公开(公告)日:2021-12-15
Provided are: a stabilizer composition that can not only impart excellent thermal stability, coloration resistance, thermal coloration resistance, and the like to a vinyl chloride resin, but also impart excellent transparency to a vinyl chloride resin when used in an application where transparency is required; a vinyl chloride resin composition containing the same; and a molded body thereof. The stabilizer composition contains 5 to 2,500 parts by mass of a component (B) with respect to 100 parts by mass of a component (A). The component (A) is at least one organic acid zinc salt, and the component (B) is at least one epoxy compound having a glycidyl ether group and/or a glycidyl ester group.