SYNTHESIS OF CROYLOXYMETHYL-1,5,7,8-TETRAMETHYLPYRROMETHENE-BF2 FOR THE PREPARATION OF NEW SOLID-STATE LASER-DYES

The synthesis of 2, croyloxymethyl-1,5,7,8-tetramethylpyrromethene-BF2 (2) was carried out in straightforward fashion from 2,6-diethyl,1,3,5 ,7,8-pentamethylpyrromethene-BF2 (1) in three steps. The monomer unit 2 has been shown to be useful for copolymerization. With methyl methac rylate for the synthesis of new solid-state optical materials. In addi tion, the synthesis of 1 has been modified to give greater yields of t his useful laser dye. (C) 1997 John Wiley & Sons, Inc.