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새로운 Quinoxalin-2-ylhydrazone類의 合成
郭美玉,鄭謚朱,金恩娥,金盛植,金銅恩,金浩植,倉澤嘉久 대구효성가톨릭대학교 자연과학연구소 1995 基礎科學硏究論集 Vol.9 No.-
The reaction of 2,6-djchloroquinoxaline(9) with m-chloroperbenzoic acid gave 2,6-dichloroquinoxaline 4-oxide(10), whose reaction with hydrazine hydrate provided 6-chloro-2-hydrazinoquinoxaline 4-oxide(11). Condensation of 6-chloro-2-hydrazinoquinoxaline 4-onide with substituted benzaldehydes or ketones to yieldsubstituted benzaldehyde quinoxalin-2-ylhydrazones(12a~c) or ketone quinoxalin-2-ylhydrazones(12d~f)was investigated. The structures of the synthesized com-pounds were confirmed on the basis of ir, 1H-nmr and mass spectral data,
Azoloquinoxaline類의 간편한 合成에 관한 硏究 : 第1報
郭美玉,南順花,金恩慶,金眞姬,韓盛旭,李萬佶,朴義煥,金浩植 고신대학교 자연과학연구소 1993 고신대학교 자연과학연구소 논문집 Vol.3 No.-
The reaction of 2, 6-dichoroquinoxaline with m-chloroperbenzoic acid gave 2, 6-dichloroquinoxaline 4-oxide, whose reaction with sodium azide provided 7-chlorotetrazolo[1, 5-a]quinoxaline 5-oxide and not the isomeric azide. The structures of the synthesized compounds were confirmed on the basis of IR, ¹H-NMR, elemental analysis and mass spectral data.
Terazoloquinoxaline類의 간편한 合成에 관한 硏究
南順花,郭美玉,鄭周怜,韓盛旭,李萬佶,倉澤가久,金浩植 대구효성가톨릭대학교 자연과학연구소 1992 基礎科學硏究論集 Vol.6 No.-
The reaction of o-phenylenediamine with methyl pyruvate gave 3-methyl-2-oxo-1,2-dihydroquinoxaline, whose reaction with phosphoryl chloride afforded 2-ch-loro -3- methylquinoxaline . The reaction of 2- chloro-3- methylquinoxaline with sodium azide in dimethyl sulfoxide provided 4-rnothyltetrazolo(1,5-a)quinoxaline. The reac-tion of 2-chloro-3-methylquinoxaline with m-chloroperbenzoic acid gave 2-chloro-3-methylquinoxaline 4-oxide, whose reaction with sodium azide in dimethyl sulfoxide provided 4-mothyltetrazolo(1,5-a)quinoxaline 5-oxide. The tautomeric behavior of compound 15 and 17 between the azido and tetrazolo forms in a solid and solution was investigated on the basis of the tautomer ratio determined by the 1H-NMR spectral data. The tautomer ratios of the azido form versus the tetrazolo form were 1 : 2 and1 . 4.
새로운 Pyrazole類의 合成에 관한 硏究 : 第1報 Ⅰ
南順花,李萬佶,郭美玉,姜一英,金浩植 대구효성가톨릭대학교 자연과학연구소 1991 基礎科學硏究論集 Vol.5 No.-
AbstrBct The reaction of 6-chloro-2- hydrazinoquinoxalines with acetylacetone or diben-zoylmethane gave pyrazoles via dehydration of the intermediate hydrazone and no triazolocompound was obtained. The probable mechanism for the formation of the pyrazole isdiscussed.
새로운 Pyrazole類의 合成에 관한 硏究 (第2報)
南順花,李萬佶,郭美玉,鄭周怜,金浩植 대구효성가톨릭대학교 자연과학연구소 1992 基礎科學硏究論集 Vol.6 No.-
The reaction of hydrazinoquinoxalines(2, 6) with dimethyl acetylenedicar-boxylate gave succinic acid derivatives(3, 7) , whose reaction with sodium methoxide in refluxing acetonitrile provided pyrazoles(4, 8) . The probable mechanism for the formation of the pyrazole is discussed. The tautomeric behavior of succinic acid derivati-ves and pyrazoles was investigated.
새로운 3-(α-Arylhydrazono)oxadiazolylmethyl-2-oxo-1 2-dihydroquinoxaline 誘導體의 合成과 토오토메리 現象에 관한 硏究
都理香,南順花,郭美玉,朴胎晝,姜一英,金浩植 대구효성가톨릭대학교 자연과학연구소 1991 基礎科學硏究論集 Vol.5 No.-
Abstract The reaction of 3-methoxycarbonylmethylene-2-oxo-1, 2, 3, 4-tetrahydro-quinoxaline with p-butylbenzenediazonium chloride gave n-arylhydrazonoester, whose reaction with hydrazine hydrate afforded α-arylhydrazonoacylhydrazide. The reaction of α-arylhydrazonoacylhydrazide with triethyl orthoformate resulted in the intramolecu-lar cyclization to give the 3-(α-(p-butylphenylhydrazono)-1,3,4-oxadiazol-2-ylmethyl)-2-oxo-1,2-dihydroquinoxaline, but not the 1, 2, 4, 5-tetrazepinylquinoxaline. The tautomericbehavior of 3-[α-(p-butylphenylhydrazono) methoxycarbonylmethyl]-2-oxo-1, 2-dihy-droquinoxaline and 3-[α-(p-butylphe nylhydrazono)-1, 3, 4- oxadiazol -2- ylmethyl ]-2-oxo-1,2-dihydroquinoxaline between the hydrazone imine and diazenyl enamine forms in the dimethyl sulfoxide solution was investigated on the basis of the tautomer ratio determined by the 1H-NMR spectral data.