Abstract
Series of coumarins containing heterocyclic substituent in 3-position were prepared. Sulfonyl chloride, a reactive group, was drawn into the heterocycle, and further condensed with amines to give series of new compounds that contain N-alkyl sulfamide. The spectral properties and dyeing character of these new dyes are discussed. A bathochromic shift (10 nm), enhanced fastness in light and sublimation (1–2 grade) and larger molar extinction coefficient (increase 104 L.mol−1.cm−1) are apparent with these new compounds. In the meantime, larger solubility appears with these new compounds.
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Luo, X., Song, J., Cheng, L. et al. Preparation of some new coumarin dyes. Sc. China Ser. B-Chem. 44, 532–539 (2001). https://doi.org/10.1007/BF02880684
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DOI: https://doi.org/10.1007/BF02880684