The instant invention discloses a process for the preparation of compounds of
the formula I:
##STR1##
wherein the general symbols are as defined in claim 1, which process
comprises reacting a compound of formula II:
##STR2##
wherein the general symbols are as defined in claim 1, with a compound
of the formula III:
##STR3##
wherein R5 is as defined in claim 1. The compounds of the
formula II are new and useful as stabilizers for protecting organic materials,
in particular synthetic polymers, reprographic materials or coating materials against
oxidative, thermal or light-induced degradation.
