Compounds of the formula (I), wherein R
1
, R
2
and R
10
independently of one another are C
1
-C
20
alkyl, phenyl, C
1
-C
12
alkylphenyl or phenyl-C
1
-C
6
alkyl; R
3
and R
4
independently of one another are hydrogen, C
1
-C
20
alkyl, NR
6
R
7
or SR
8
, provided that at least one of R
3
or R
4
is NR
6
R
7
or SR
8
; R
5
is hydrogen or C
1
-C
20
alkyl; R
6
and R
7
independently of one another are C
1
-C
20
alkyl, or R
6
and R
7
together with the N-atom to which they are attached form a 5 or 6 membered ring, which optionally is interrupted by O, S or NR
9
and which optionally additionally is substituted by one or more C
1
-C
4
alkyl; R
8
is phenyl, biphenylyl, naphthyl, anthryl or phenanthryl, all of which optionally are substituted by one or more C
1
-C
4
alkyl; and R
9
is hydrogen, C
1
-C
20
alkyl, C
2
-C
4
hydroxyalkyl or phenyl; exhibit an unexpectedly good performance in photopolymerization reactions.
化合物的公式(I),其中R1、R2和R10彼此独立地是C1-C20烷基、苯基、C1-C12烷基苯基或苯基-C1-C6烷基;R3和R4彼此独立地是氢、C1-C20烷基、NR6R7或SR8,但至少其中之一是NR6R7或SR8;R5是氢或C1-C20烷基;R6和R7彼此独立地是C1-C20烷基,或者R6和R7连同它们所连接的N原子形成一个5或6元环,该环可以被O、S或NR9中的一个或多个打断,也可以被一个或多个C1-C4烷基取代;R8是苯基、
联苯基、
萘基、
蒽基或
菲基,它们都可以选择性地被一个或多个C1-C4烷基取代;R9是氢、C1-C20烷基、C2-C4羟基烷基或苯基。这些化合物在光聚合反应中表现出意外的良好性能。