Patent ID: 6787621
Filing Date: 2004-09-07
Classification: C07D,C08F,C08G

Abstract:
A diarylethene monomer of the formula (1), wherein Z1 and Z2 are (a) each a independently cyano group or (b) chemically linked together to form a 4-6-membered ring, the ring being optionally substituted with one or more fluoro atoms; and Ar1 and A2 are independently where X and Y are independently O, S, NH or Nâ€”OH3; R2 and R5 are independently optionally substituted C1-C3 alkyls; R3 is H, F or optionally substituted C1-C3 alkyls; R4 and R6 are independently H, CH3, C(&boxH;O)CH3, isoxazole, vinyl, C(&boxH;O)â€”Ar3â€”CH&boxH;CH2, C(&boxH;O)â€”Ar4, or N(Ar5)2, with the proviso that at least one of Ar1 or Ar2 comprises R4 or R6 chosen from vinyl or C(&boxH;O)â€”Ar3â€”CH&boxH;CH2, and Ar3, Ar4 or Ar5 are optionally substituted benzenes or thiophenes.