Synthesis of isomers of rhodamine 575 and rhodamine 6G as new laser dyes

Article abstract of DOI:10.1016/S0040-4039(99)00914-4

Two new laser dyes of the rhodamine family, substituted at C-1 and C-8, were prepared by condensation of phthalic anhydride with 3-ethylamino-5- methylphenol. Two methodologies have been investigated for the preparation of the latter.