DETERMINATION OF THE STRUCTURE OF LAMINO-4-(1,2,3-TRIAZOL-1-YL)2H-1-BENZOPYRAN-2-ONE DERIVATIVES USING 2-DIMENSIONAL HETERONUCLEAR CHEMICAL-SHIFT CORRELATED NMR TECHNIQUES

H-1 and C-13 NMR spectra of hylamino-4-(1,2,3-triazol-1-yl)-2H-1-benzo pyran-2- one derivatives have been studied. The location of the substi tuent 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 mo iety experience anisotropic influence of the phenyl subsituent at the C(5') atom in the triazole ring.