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Hydromethylamination of 1,3-diaryl-3-(2-oxocyclohexyl)propan-1-ones produces N-methyl-2,4-diaryldecahydroquinolines with cis-fused hetero- and carbocycles that are stabilized in the A conformation. The reaction involves Δ 2,3,9,10 intermediates and their subsequent reduction.
2,5-Bis(5-aryl-1,3,4-oxadiazol-2-yl)furans are synthesized via the reaction of trichloromethylarenes with furan-2,5-dicarboxylic acid dihydrazide. The structures of the products are confirmed by IR and mass spectra.
Proof of the nitrogen oxide generation during the chemical reduction of a series of nitrofuran derivatives is obtained by polarographic detection of the nitroprusside anion. A hypothesis is made about the mechanism of the peroxynitrite anion formation, which is responsible for the biological...
Nucleophilic addition of organometallic lithium and magnesium compounds to 1-alkyl-3-(2-quinolyl)quinolinium cations produces a mixture of the corresponding 1′-alkyl-2′-R-1′,2′-dihydro-2,3′-biquinolyls and 1′-alkyl-4′-R-1′,4′-dihydro-2,3′-biquinolyls. The portion of the latter...
2,2′-Bi(5-(2,5-dihydroxy-3,4,6-trichlorophenyl)thiazole) and 6-(2,5-dihydroxy-3,4,6-trichlorophenyl)-2-imino-3,4-dihydro-4H-1,4-thiazin-3-thione are synthesized from 2,5-dihydroxy-3,4,6,7-tetrachloro-2,3-dihydrobenzo(b)furan and dithiooxalyldiamide. The products are oxidized by FeCl 3 to the...
Electrochemical reduction of 3,5-diethoxycarbonyl- and 3,5-diacetyl-2,6-dimethyl-1,4-dihydropyrdine, hexahydroquinol-5-one, and hexahydroisoquinol-8-one, which contain dihydropyridine moieties, produces free radicals detectable by EPR only for the most easily reduced hexahydroisoquinol-8-ones....
The intermediates in the Hantzsch reaction of the methyl ester and diethylamide of phenylchloropyruvic acid with N,N′-diphenylthiourea are derivatives of 2-phenylimino-3,5-diphenyl-4-hydroxythiazoline-4-carboxylic acid. They exist as an equilibrium mixture of two diastereomers in solution.
The nitrogen atoms of isatin, its 5-bromoderivative, and their β-ethyleneacetals are alkylated by 1,2-dichloroethane in K 2 CO 3 −DMF and LiH(NaH)-DMF.
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