A-Oxo-N-heterocyclics

Hydrogen chloride acetic anhydride a-Oxo-N-heterocyclics from o-carboxy-N-oxides... [Pg.378]

Triethylamine Nucleophilic substitution in a position of N-heterocyclics a-Oxo-N-heterocyclic azlnes from a-alkylthiocyclimmonium salts... [Pg.161]

Sym. azines. 90%-Hydrazine hydrate added to 2-ethylthio-3-ethylbenzothiazo-lium ethosulfate in methanol, then triethylamine added whereupon the temp, rises to 40-50° 3-ethylhenzothiazol-2-one azine. Y 95. — Direct reaction of nucleophiles with a-oxo-N-heterocyclics is not possible. F. e., also unsym. azines, s. S. Hunig et al., A. 676, 36 (1964). [Pg.161]

Hydrogen peroxide/hydrogen chloride y, y -Dichloro-a-oxo-N-heterocyclics... [Pg.183]

Gyclic ketocarboxylic acid esters from N-nitroso-a-oxo-N-heterocyclics s. 18, 850... [Pg.249]

Ethyl 4-chloro-6,7-dimethoxyquinoIine-3-carboxyIate and dimethyl sulfoxide heated 2 hrs. on a steam bath ethyl 4-hydroxy-6,7-dimethoxyquinoline-3-carboxylate. Y 87%. F. e. and limitations s. N.D. Harris, Synthesis 1972, 625 a-oxo-N-heterocyclics, also in the presence of Nal, cf. R. E. Lyle and M. J. Kane, J. Org. Chem. 38, 3740 (1973). [Pg.70]

Ring expansion of a-oxo-N-heterocyclics with diazo compds. 2-Hydroxy-l,4-dihydroquinolines... [Pg.197]

Labeling s. Compds., labeled Labile s. Unstable Lactams (s. a. a-Oxo-N-heterocyclics)... [Pg.265]

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