A series of 4-benzylphenols, 2-methyl-4-benzylphenols, 4-methyl-2-benzylphenols and 4-methoxy-2-benzylphenols have been prepared and evaluated as antioxidants for tetralin at 60 °C by means of an oxygen-absorption method. Very good activities have been observed with a series of 4-methoxy-2-benzylphenols. The electrochemical oxidation potentials of these compounds were determined using linear-sweep
Tertiary hydroperoxides have been utilized for the electrophilic alkylation of activated aromatic substrates, particularly phenols and phenol ethers. Cumyl (1) and tert-butyl (2) hydroperoxides have shown a greatly different behavior as concerns the catalysis and the regioselectivity. The best catalyst for 1 is TiCl(4), which is completely inactive with 2. With the latter an effective catalyst is FeCl(3)
METHOD FOR PRODUCING TRISPHENOLS AND MONOESTER-SUBSTITUTED PRODUCTS THEREOF, AND 4-ACYLARALKYLPHENOL DERIVATIVES
申请人:Ojiri Akihiko
公开号:US20120108853A1
公开(公告)日:2012-05-03
Trisphenols of general formula (1), which are useful as starting materials for polymer, are industrially easily produced by a method using as a starting material 4-aralkylphenol derivatives expressed by general formula (2):
wherein X represents a hydrogen atom or leaving group that can be substituted with a hydrogen atom.
2-(2-Hydroxy-3.5-disubstituiertes-phenyl)-2H-benzotriazol und damit stabilisierte Mischungen
申请人:CIBA-GEIGY AG
公开号:EP0006564A2
公开(公告)日:1980-01-09
Verbindungen der Formel
worin T, Wasserstoff oder Chlor ist, T2 und T3 unabhängig voneinander die Gruppe
bedeuten, worin T4 Wasserstoff oder niedriges Alkyl ist, wobei eines von T2 und T3 auch t-Octyl sein kann, als Lichtschutzmittel für organisches Material, Verfahren zu ihrer Herstellung, das mit ihnen ausgerüstete organische Material, insbesondere mit ihnen ausgerüsteter Lack.
式中 T 为氢或氯,T2 和 T3 相互独立地为 T4 为氢或低级烷基的基团,T2 和 T3 中也可以有一个是 t-辛基,作为有机材料的光稳定剂,其制备工艺,用其处理的有机材料,特别是用其处理的漆。