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An environmentally benign and efficient method has been developed for the synthesis of a series of 2H-indazolo[2,1-b]phthalazine-triones derivatives with b-cyclodextrine-SO 3 H as a recyclable catalyst by simply combining of various aldehydes with cyclic 1,3-diketones and phthalhydrazide under solvent free condition. The advantageous features of this methodology are high atom-economy, operational simplicity, shorter reaction time, convergence, and facile automation. Graphical Abstract A greener, efficient, and expeditious method has been developed for the synthesis of 2H-indazolo [2,1-b] phthalazine-triones derivatives with b-cyclodextrine-SO 3 H as a recyclable catalyst for the first time. NH NH O O O O N N O + + R 2 R 2 R 1 H O O R 1 O R 2 R 2 β-cyclodextrin-SO 3 H Keywords b-Cyclodextrine-SO 3 H Á Homogeneous catalyst Á 2H-indazolo[2,1-b]phthalazine-triones Á Solvent free Á MCRs Electronic supplementary material The online version of this article (

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SHINDE, V. V.; LEE, S. D.; JEONG, Y. S.; JEONG*, Y. T.; Tetrahedron Lett. 56 (2015) 6, 859-865, http://dx.

Abstract:In this research, we focused on the development of cy3 dye with high thermal stability and good solubility for LCD color filter. Cy3 dyes were prepared through the synthetic procedure of two steps. The synthesized cy3 dyes were characterized by using NMR, FT-IR, UV/Vis spectroscopy, and TGA. These cy3 dyes showed maximum absorption wave length (λmax) in the range of 549∼555 nm in UV/Vis spectrum. And we confirmed that solubility characteristics and thermal stability of cy3 dyes were dependent on the structure of counter cation. Cy3 dyes with methyl counter cation and ethyl counter cation have good solubility in organic solvents such as chloroform, ethanol, and PGME. Moreover, Cy3 dye with ethyl counter cation gave excellent thermal stability in TGA thermograms. And Cy3 dye with ethyl counter cation showed good result in photoresist film test.