29682-75-5Relevant academic research and scientific papers
A simple one-pot preparation of 2-pyridones from acyl isocyanates utilizing trimethylsilylketene
Takaoka, Kiyo,Aoyama, Toyohiko,Shioiri, Takayuki
, p. 4973 - 4976 (2007/10/03)
Trimethylsilylketene reacts with acyl isocyanates to give 4- trimethylsiloxy-1,3-oxazin-6, ones which smoothly undergo the Diels-Alder reaction with dimethyl acetylenedicarboxylate and methyl propiolate to furnish 2-pyridones.
AZOLES AND AZINES. 62. STRUCTURE OF 2-ARYL-1,3-OXAZINE-4,6-DIONES
Zakhs, V. E.,Yakovlev, I. P.,Smorygo, N. A.,Gindin, V. A.,Ivin, B. A.
, p. 325 - 332 (2007/10/02)
1H, 13C NMR, IR, and UV spectra have been studied for solutions of a number of potentially tautomeric 2-aryl-1,3-oxazine-4,6-diones and their 5-methyl substituted analogs with variation of substitutent at the para position of the benzene ring, as well as compounds with a fixed structure that simulates possible tautomeric forms.The data have been compared with the results of quantum chemical calculations carried out in SSO MO LCAO approximation by the CNO, CNDO/2, and MPNDO/3 methods.In DMSO and THF solution the test compounds exist predominantly as 2-aryl-4-hydroxy-6H-1,3-oxazin-6-ones.The para substituent in the benzene ring does not effect the composition of the tautomer mixture significantly.
AZOLES AND AZINES. 61. REACTION OF MALONYL DICHLORIDE WITH AROMATIC AMIDES
Zakhs, V. E.,Yakovlev, I. P.,Ivin, B. A.
, p. 321 - 324 (2007/10/02)
In the reaction of malonyl dichloride with substituted -enzamides, cyclic and linear products and their mixtures form, depending on the solvent and the ratio and concentrations of reagents.When the reaction is carried out in dilute dichlororethane solutio
