全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Benjamin E. Ezema , Chidimma G. Ezema ...
来源:[J].Oriental Journal of Chemistry, 2015, Vol.31 (1)材料科学研究所
摘要:Tetraaza benzoxazinophenothiazine heterocyclic rings were synthesized and characterized. The key intermediate, 11-amino-6-chlorobenzo[a]-8,10-diazaphenoxazin-5-one was prepared by reaction of 4,5-diamino-6-hydroxypyimidine with 2,3-dichloro-1,4-naphthoquinone in anhydrous sodium ...
作者:Benjamin E. Ezema , Chidimma G. Ezema ...
来源:[J].Oriental Journal of Chemistry, 2015, Vol.31 (1)材料科学研究所
摘要:Isomeric derivatives of angular aza benzophenothiazine and complex aza benzothiazinophenothiazine rings were successfully synthesized. Reactions of 2-amino-3,5-dibromopyrazine with 6,7-dibromoquinoline-5,8-dione in anhydrous sodium carbonate gave isomeric angular aza benzophenoth...
作者:Jude I. Ayogu , Benjamin E. Ezema , Chidimma G. Ezema
来源:[J].Asian Journal of Chemistry(IF 0.253), 2015, Vol.27 (12)亚洲化学杂志
摘要:Palladium-catalyzed Suzuki-Miyaura cross-coupling reactions of 6-chloro-5H-benzo[a]phenothiazin-5-one (1), 11-amino-6-chloro-9-thio-5H-naphtho[2,1-b]pyrimido[5,4-e][1,4]oxazin-5-one (2) and 6-chloro-5H-naphtho[2,1-b]pyrido[2,3-e][1,4]oxazin-5-one (3) with phenylboronic acid ...
作者:Benjamin E. Ezema , Samuel A. Egu ...
来源:[J].Asian Journal of Chemistry(IF 0.253), 2016, Vol.29 (1)亚洲化学杂志
摘要:In this study, the synthesis of new angular phenoxazine and triangular benzoxazinophenothiazine dyestuffs is described. This was achieved by the synthesis of 10-amino-6-chlorobenzo[a]phenoxazin-5-one intermediate. The intermediate was converted into 10-amino-6-phenylbenzo[a]pheno...
作者:Benjamin E. Ezema , Chidimma G. Ezema ...
来源:[J].Chemistry and Materials Research, 2014科学、技术和教育国际协会
摘要:Six derivatives of heterocyclic azo dyes were synthesized by coupling diazotized aniline and 4-nitroaniline with quinolin-8-ol, 5-nitrosoquinolin-8-ol and 5-nitroquinolin-8-ol respectively. Benzene diazonium salt and 4-nitrobenzene diazonium salt were prepared by treating aniline...

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