| abstract |
A process of making compounds of formula (I), wherein Z is an unsubstituted or substituted n-valent cyclic moiety bearing at least one endocyclic oxirane group; Y is O, S, NH, (Ia) or (Ib); R2 is a divalent linking group; X is O, S or NH; R1 is H or (C¿1?-C6) alkyl; and n is an integer from 1 to 6, Z being mono- to hexavalent respectively, it being possible for -Y-R?2¿ to represent a single bond, comprises reacting a compound of formula (II), wherein Z1 is a cyclic moiety bearing at least one endocyclic C=C group; and Y, R?2, X, R1¿ and n are as defined above with hydrogen peroxide in the presence of (a) tungstic acid or tungsten oxide or molybdic acid or a molybdenum oxide; (b) phosphoric acid or a salt thereof; and (c) at least one phase transfer catalyst. |