• Fibers and Polymers
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• 제2권3호
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• pp.153-158
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• 2001

Nine disperse dyes have been synthesized by diazotization of 2-amino-4-(p-nitrophenyl)-5-nitrothiazole and coupled to substituted N-alkylanilines. Spectral properties in the IR and visible range of the dyes obtained were investigated. The dyeing performance of these dyes was assessed on nylon and polyester fibers. These dyes were found to give reddish brown to bluish violet shades on dyeing with very good depth, brightness and levelness on nylon and polyester fibers. The dyed fibers showed fairly good light fastness, very good to excellent fastness to wash, rubbing, perspiration and excellent fastness to sublimation. The dyebath exhaustion and fixation on the fiber were found to be very good.

• 약학회지
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• 제49권2호
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• pp.162-167
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• 2005

Synthetic method for the selective N-monoalkylation of anilines using alkyl halides and triethylamine under room temperature was described. The corresponding N-alkyl anilines were obtained in good yields with minor quantities of dialkylated products. Anilines 2a-m and 3a-m were identified using NMR and IR. A series of 2a-m and 3a-m has been synthesized from aniline, toluidines, ethylanilines, aminoacetophenones, phenetidines. Formation of anilines was undertaken with dropping of alkylhalides at room temperature in methanol (or ethanol) for 3 hours~5 days. Selectivity on the monoalkylation was relatively high. Synthetic ratio of monoalkylated and dialkylated product was 94 : 6 in case of maximum monoalkylation.

• 약학회지
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• 제48권3호
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• pp.202-206
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• 2004

New asymmetric dimers, N,N'-dialkyl-4'-hydroxy-4-oxo-2,2',3,3'-tetrahydro-2,2'-diphenyl-4,4'-quinolones 3a-f were synthesized through the dehydration and dea1coholation of N-alkylanilines and ethyl benzoylacetate. Dimers 3a-f were identified by NMR, IR and GC-MS. A series of dimer 3a-f has been synthesized using acid-catalyzed one-pot reaction that involved the condensation, cyc1ization and dimerization. Similarly, the 6,6'-methoxy (or 7,7'-methoxy) substituted dimers were prepared from N-alkyl-meta-(or para)-anisidines. Formation of dimers was undertaken with p-toluenesulfonic acid (p-TSA) at 90∼11$0^{\circ}C$ in toluene for 2∼6 hours over the Dean-Stark apparatus.

• 대한화학회지
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• 제45권5호
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• pp.454-460
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• 2001

3-Methoxycarbonylmethylene-2-oxo-1,2,3,4-tetrahydroquinoxaline(7)을 hydrazine hydrate와 반응시켜 3-hydrazinocarbonylmethylene-2-oxo-1,2,3,4-tetrahydroquinoxaline(8)을 합성하였다. 화합물 8을 alkyl (ethoxymethylene)cyanoacetate류와 반응시켜 [(quinoxalin-2-ylidene)ethanoyl]-1H-pyrazole류(9)를 합성하였고, 화합물 9b를 N-alkylaniline류와 반응시켜 N-alkyl-(quinoxalin-2-ylidene)-N-phenylethanamide류(10)를 합성하였다. 얻어진 화합물 9, 10은 용액에서 enamine 형과 methylene imine 형 사이에 토토머화 현상을 나타내었는데, 이들의 토토머비를 $^1H$ NMR 로서 측정하였다.