Patent ID: 6444278
Filing Date: 2002-09-03
Classification: C07B,C07C,C07D,C08K,C09K

Abstract:
A 2,6-di-tert-butylphenol of the formula I in whichR is a straight chain alkyl radical having 1 to 18 carbon atoms which is unsubstituted and in which one or more non-adjacent CH2 groups are optionally replaced by a radical selected from the group consisting of â€”Oâ€”, â€”COâ€” and â€”Câ‰¡Câ€”, A1 and A2 are, independently of one another, a) a 1,4-phenylene radical, in which one or two CH groups are optionally replaced by N, or b) a 1,4-cyclohexenylene or 1,4-cyclohexylene radical, in which one or two non-adjacent CH2 groups are optionally replaced by â€”Oâ€” or â€”Sâ€”, wherein the radical a) is optionally monosubstituted or polysubstituted by halogen atoms, and/or cyano groups, and radical b) is optionally monosubstituted or polysubstituted by halogen atoms, and/or cyano and/or methyl groups, Z1 and Z2 are each, independently of one another, â€”COâ€”Oâ€”, â€”Oâ€”COâ€”, â€”CH2â€”Oâ€”, â€”OCH2â€”, â€”CH2CH2â€”, â€”CH&boxH;CHâ€”, â€”Câ‰¡Câ€” or a single bond, and m and n are each, independently of one another 0, 1, 2 or 3, where m+n&gE;1, with the proviso that compounds of the formulae â€ƒeach where R=â€”Câ‰¡CH, alkyl or alkyl with the CH2 group bonded to the ring replaced by â€”Oâ€” or â€”COâ€” and each where the phenyl rings are optionally further substituted by chlorine or bromine atoms, are excluded.