| 摘要 |
<p>Disclosed are merocyanine derivatives which correspond to the formula (I), wherein L1, L2 and L3 independently of each other are hydrogen; or L1 and L3 may be linked together to form a carbocyclic ring; R3 and R4 independently of each other are CN; -COR5; -COOR5; -CONR5R6; C1-C22alkyl; C2-C22alkenyl; C2-C22alkinyl; C3-C12cycloalkyl; C3-C12cycloalkenyl; C7-C20aralkyl; C1-C20heteroalkyl; C3-C12cycloheteroalkyl; C3-C18heteroaralkyl; C6-C20 aryl; C1-C12alkylcarbonylamino-C6-C20aryl; C2-C12heteroaryl; or -X2-Sil2; n is a number from 1 to 4; the meaning of R1 and R2 depends on the definition of n. The compounds are useful as UV absorbers for cosmetic applications.</p> |
