Reaction of 6,7-dimethoxy-3-isochromanone with hydrazine: a reinvestigation
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چکیده
منابع مشابه
The reaction of ethyl 2-oxo-2H-chromene-3-carboxylate with hydrazine hydrate.
Although salicylaldehyde azine (3) was reported in 1985 as the single product of the reaction of ethyl 2-oxo-2H-chromene-3-carboxylate (1) with hydrazine hydrate, we identified another main reaction product, besides 3, which was identified as malono-hydrazide (4). In the last two decades, however, some articles have claimed that this reaction afforded exclusively hydrazide 2 and they have repo...
متن کامل1,2-Bis(3-phenoxybenzylidene)hydrazine
Mol-ecules of the title compound, C(26)H(20)N(2)O(2), reside on crystallographic centres of inversion located at the mid-point of the N-N bond. The benzyl-idene ring is essentially coplanar with the central hydrazine group, with an inter-planar angle of 4.5 (2)°, whereas the phenyl ring is oriented at 34.0 (3)° with respect to the mean plane of the central 1,2-dibenzyl-idenehydrazine group. In ...
متن کاملSynthesis, antimicrobial activity and conformational analysis of novel substituted pyridines: BF(3)-promoted reaction of hydrazine with 2-alkoxy pyridines.
Some new 2-alkoxy-3-cyano-4,6-diarylpyridines 3,4 were synthesized by condensation of different alpha,beta-unsaturated ketones 1 with malononitrile 2, followed by cyclization in sodium alkoxide/alcohol system. Lewis acid-catalyzed reaction of 4 with hydrazine afforded the corresponding 1H-pyrazolo[3,4-b]pyridines 5. The potency of the results as antimicrobial agents has been evaluated. The stru...
متن کاملA copper-mediated cyclization reaction of hydrazine with enediynones providing pyrazolo[1,5-a]pyridines.
2,7-Disubstituted pyrazolo[1,5-a]pyridines were synthesized in good chemical yields by the reaction of enediynones with hydrazine, followed by addition of copper chloride. This reaction can tolerate many functional groups.
متن کاملA Reinvestigation of Nitration of Phenols with Metal Nitrates under Non-Aqueous and Aprotic Conditions
Nitration of phenol and various 4-substituted phenols with Cu(NO3)2.3H2O, Cu(NO3)2.3H2O/SiO2, 9H2O and Cr(NO3)2. 9H2O in different anhydrous organic solvents are investigated. High selectivity ratio of para vs ortho isomers has been observed. Mono- and dinitro compounds f...
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ژورنال
عنوان ژورنال: Canadian Journal of Chemistry
سال: 1983
ISSN: 0008-4042,1480-3291
DOI: 10.1139/v83-188