A study of plant coumarins 16*. Synthesis and transformations of 7-alkynylcoumarins
作者:Alla V. Lipeeva、Elvira E. Shults
DOI:10.1007/s10593-018-2210-5
日期:2017.12
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.
Study of plant coumarins: XIV. Catalytic amination of 7-hydroxycoumarin derivatives
作者:E. A. Makhneva、A. V. Lipeeva、E. E. Shul’ts
DOI:10.1134/s107042801405008x
日期:2014.5
Catalytic amination of 7-hydroxy-6-cyanocoumarin or 7-hydroxy-6-methoxycarbonylcoumarin triflates with substituted anilines, isoquinolin-5-amine, 1H-pyrazol-3-amine, or amino acids of penicillin series affords the corresponding 7-(N-substituted) aminocoumarins. In the amination of the mentioned triflates and also of peuruthenicine tosilate with 2-(piperidin-1-yl)aniline the catalytic system Pd(OAc)(2)-BINAP has been efficient.