A STUDY OF PLANT COUMARINS. 16. SYNTHESIS AND TRANSFORMATIONS OF 7-ALKYNYLCOUMARINS
DOI:
https://doi.org/10.1007/4232Keywords:
arylalkynes, coumarins, 1, 2, 3-triazoles, CuААС reaction, Sonogashira reactionAbstract
7-Alkynyl-substituted coumarins were synthesized by a Sonogashira reaction of 6-substituted 7-(trifluoromethylsulfonyloxy)coumarins with terminal acetylenes. The reaction of 7-ethynyl-substituted coumarins with azidobenzoic acids in the presence of copper(II) sulfate and sodium ascorbate was used to synthesize the respective 7-[(1-carboxyphenyl)-1H-1,2,3-triazol-4-yl]coumarins.
Authors: Alla V. Lipeeva, Elvira E. Shults*