| 摘要 |
Compounds of the formulae (I), (II), (III) and (IV), wherein Ch<SUB>1 </SUB>is e.g. the formula (V) or (VI); Ch<SUB>2 </SUB>is the formula (VII) or (VIII); Het<SUB>1 </SUB>is for example furyl, thienyl, pyrrolyl, pyridyl, benzothienyl, quinolyl or bithienyl; each of which is optionally substituted; Het<SUB>2 </SUB>and Het<SUB>2</SUB>' e.g. are furylene, thienylene, pyrrolylene, benzothienylene, quinolylene, furylenecarbonyl, thienylenecarbonyl, benzothienylenecarbonyl or bithienylenecarbonyl; each of which is optionally substituted; A<SUB>1</SUB>, and Ar<SUB>1</SUB>' i.a. are phenyl, naphthyl, benzoyl or naphthoyl, each of which is optionally substituted; Ar<SUB>2 </SUB>is for example phenylene, optionally substituted; M i.a. is C<SUB>1</SUB>-C<SUB>20</SUB>alkylene; R<SUB>1 </SUB>is for example C<SUB>1</SUB>-C<SUB>12</SUB>alkyl or phenyl; R<SUB>2 </SUB>and R<SUB>2</SUB>' for example are hydrogen or C<SUB>1</SUB>-C<SUB>20 </SUB>alkyl; exhibit an unexpectedly good performance in photopolymerization reactions.
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