| abstract |
Compounds of the formula (I) n n n n n n n n n n whereinn Q is a direct bond or an n-valent linking group; n is an integer 2, 3, or 4; Z is for example C 1 -C 20 alkylene, C 2 -C 20 alkenylene, C 5 -C 8 cycloalkylene or C 5 -C 8 cycloalkenylene; Y is for example C 6 -C 20 aryl or C 3 -C 20 heteroaryl; R 1 is for example hydrogen, C 2 -C 5 alkenyl, C 3 -C 8 cycloalkyl, C 1 -C 12 alkyl, phenyl, naphthyl, C 3 -C 20 heteroaryl, C 1 -C 8 alkoxy, benzyloxy or phenoxy; R 2 is for example C 1 -C 20 alkyl, C 2 -C 12 alkenyl, C 4 -C 8 cycloalkenyl, C 2 -C 12 alkinyl, C 3 -C 10 cycloalkyl, phenyl or naphthyl; R 15 , R 16 , R 17 , R 18 , R 19 and R 20 independently of each other for example are hydrogen, halogen, C 1 -C 20 alkyl, C 6 -C 20 aryl or C 4 -C 20 heteroaryl; provided that a compound wherein R 15 , R 16 , R 17 , R 15 , R 19 and R 20 are hydrogen, Y is thienyl, R 1 is methyl, R 2 is ethyl, n is 2, Q is a direct bond and Z is n-propylene and a compound wherein R 15 , R 16 , R 17 , R 18 , R 19 and R 20 are hydrogen, Y is thienyl, R 1 is methyl, R 2 is ethyl, n is 2, Q as an n-valent linking group is methylene and Z is methylene are excluded; are reactive photoinitiators in particular in electronic applications. |