Journal
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
Volume 17, Issue 10, Pages 2627-2636Publisher
SPRINGER
DOI: 10.1007/s13738-020-01956-5
Keywords
Cross-coupling reaction; Pyran; Linear optical properties; DCM; Bis-DCM
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Funding
- University of Tabriz
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In this work, the C-N cross-coupling reaction between bromine-substituted pyranilidene derivatives, and a variety of secondary amines was studied in the presence of transition metal catalysts. The CuI/l-proline, Pd(OAC)(2)/PPh3, and MnCl2.6H(2)O/l-proline were chosen as catalyst/ligand systems. The copper-catalyzed Ullmann amination reaction in the presence ofl-proline as auxiliary ligand shows the best yield. The structure of pyran-based chromophores was confirmed using FT-IR,H-1 NMR,C-13 NMR, and mass spectroscopy. Additionally, the linear optical properties of final compounds were investigated using UV-Vis and fluorescent spectroscopy. The large stokes shifts for final compounds show the capability of using these compounds in optical applications. [GRAPHICS] .
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