Chemistry of Heterocyclic Compounds p. 640 - 644 (1980)
Update date:2022-08-03
Topics:
Stekhova, S. A.
Zagulyaeva, O. A.
Lapachev, V. V.
Mamaeva, V. P.
The structures of pyrazinoyl-, 3-pyridazinoyl-, 4-pyrimidoyl-, and 2-, 3-, and 4-pyridoylacetic esters were studied by means of IR, NMR, and 1H and 13C NMR spectroscopy and quantum-chemical calculations (Pariser-Parr-Pople and CNDO/2).The effect of solvents (including strongly and weakly basic solvents) on the position of the tautomeric equilibria of these β-keto esters was studied.The ?+ constants for the keto and enol fragments were estimated by means of quantum-chemical calculations and 13C NMR spectroscopy.
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(2021)Doi:10.1016/S0040-4020(01)83123-9
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(1975)
