Brief Communications

Russian Chemical Bulletin

, Volume 43, Issue 7, pp 1270-1272

First online:

Determination of the structure of 7-diethylamino-4-(1,2,3-triazol-1-yl)-2H-1-benzopyran-2-one derivatives using two-dimensional heteronuclear chemical-shift correlated NMR techniques

  • N. N. SveshnikovAffiliated withInstitute of Chemical Physics in Chernogolovka, Russian Academy of Sciences
  • , M. A. KirpichenokAffiliated withK. A. Timiryazev Moscow Agricultural Academy

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1H and13C NMR spectra of 7-diethylamino-4-(1,2,3-triazol-1-yl)-2H-1-benzopyran-2-one derivatives have been studied. The location of the substituent in the 1,2,3-triazole ring was determined by the 2D COLOC method. It was established that the H(3) and H(5) protons in the coumarin moiety experience anisotropic influence of the phenyl subsituent at the C(5′) atom in the triazole ring.

Key words

7-diethylamino-4-(1,2,3-triazol-1-yl)-2H-1-benzopyran-2-ones 1H,13C NMR, two-dimensional NMR COLOC method