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새로운 4H-1,3,4-Oxadiazino[5,6-b]quinoxaline 유도체들의 합성
김동은,김호식,Kim, Tong Eun,Kim, Ho Sik 대한화학회 1998 대한화학회지 Vol.42 No.4
The reaction of 6-chloro-2-hydrazinoquinoxaline 4-oxide (11) with ethyl chloroglyoxylate provided ethyl 8-chloro-4H-1,3,4-oxadiazino[5,6-b]quinoxaline-2-carboxylate (12) through the intramolecular cyclization. The reaction of 12 with hydrazine hydrate afforded the $C_2$-hydrazinocarbonyl derivative 13, whose reactions with substituted benzaldehydes or heteroaryl aldehydes provided 8-chloro-2-(substituted benzylidenehydrazinocarbonyl)-4H-1,3,4-oxadiazino[5,6-b]quinoxalines (14) or 8-chloro-2-[(2-substituted methylidene)hydrazinocarbonyl]-4H-1,3,4-oxadiazino[5,6-b]quinoxalines(15), respectively. 6-Chloro-2-hydrazinoquinoxaline 4-oxide(11)와 ethyl chloroglyoxylate를 반응시켜 분자내 고리화반응에 의한 ethyl 8-chloro-4H-1,3,4-oxadiazino[5,6-b]quinoxaline-2-carboxylate(12)를 합성하였다. 화합물 12를 hydrazine hydrate와 반응시켜 $C_2$-hydrazinocarbonyl 유도체 13이 합성되었는데, 이것을 치환 벤즈알데히드류 및 헤테로아릴 알데히드류와 반응시켜 8-chloro-2-(substituted benzylidenehydrazinocarbonyl)-4H-1,3,4-oxadiazino[5,6-b]quinoxaline류(14) 및 8-chloro-2-[(2-substituted methylidene)hydrazinocarbonyl]-4H-1,3,4-oxadiazino[5,6-b]quinoxaline류(15)를 각각 합성하였다.
3-(1,2,4-Triazol-5-yl)methylene-2-oxo-1,2,3,4,-tetrahydroquinoxaline의 간편한 합성에 관한 연구
金浩植,金恩慶,李城旭,金成湜,金銅恩 대구효성가톨릭대학교 1996 연구논문집 Vol.53 No.2
The reaction of 3-methoxycarbonylmethylene-2-oxo-1,2,3,4-tetrahydroquinoxaline(14) with hydrazine hydrate gave 3-hydrazinocarbonyl-methylene-2-oxo-1,2,3,4-tetrahydroquinoxaline(15), whose reaction with phenyl isothiocyanate provided 3-(4-phenyl-3,4-dihydro-3-thioxo-2H-1,2,4-triazol-5-yl)methylene-2-oxo-1,2,3,4-tetrahydroquinoxaline(16). The tautomeric behavior of compound 15 was investigated on the basis of the tautomer ratio determined by the ¹H-nmr spectral data. The structures of the synthesized compounds were confirmed on the basis of ir, ¹H-nmr and mass spectral data.
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,