PROCESS FOR THE PREPARATION OF SUNSCREEN COMPOSITION AND COMPOUNDS FOR USE THEREIN

摘要

PCT No. PCT/AU87/00330 Sec. 371 Date May 26, 1988 Sec. 102(e) Date May 26, 1988 PCT Filed Sep. 25, 1987 PCT Pub. No. WO88/02251 PCT Pub. Date Apr. 7, 1988.The invention relates to sunscreen compositions comprising an effective component at least one compound of formula I I wherein R1 is selected from alkyl, alkenyl, alkynyl substituted alkyl, substituted alkenyl, phenyl, substituted phenyl, substituted benzyl, cycloalkyl, cycloalkenyl, substituted cycloalkyl, substituted cycloalkenyl and polymeric groups; R2 is selected from hydrogen, alkyl and alkoxy; and wherein R1 and R2 may form a carbocyclic ring which may be substituted; R3 is selected from alkyl, sustituted alkyl, alkenyl, substituted alkenyl, alkynyl, phenyl, benzoyl, substituted phenyl, substituted benzyl, substituted benzoyl, cycloalkyl, substituted cycloalkyl, cycloalkenyl, substituted cycloalkenyl, alkanyoyl, substituted alkanoyl, polymeric groups, the group OROROR9 wherein R is a bivalent hydrocarbon radical and R9 is alkyl, alkenyl, phenyl benzyl, substituted phenyl, substituted benzyl; R4 is alkyl or alkoxy; n is an integer from 0 to 4; and R5 and R6 are independently selected from alkyl, alkoxy, alkanoyl, alkanoyl substituted by hydroxyl or alkoxycarbonyl and R5 and R6 may form a spiro carbocyclic ring which may be substituted with alkyl; and the invention also relates to novel compounds of formula I and to a method of screening a surface from ultraviolet radiation.