检索结果-南通市图书馆

Science China Chemistry 2009年第9期52卷 1451-1455页

作者： HU BoWen ZHAO JiongPeng YANG Qian ZHANG XiaoFeng BU XianHe Department of Chemistry Nankai UniversityTianjin 300071China

This paper reports two new coordination polymers formed by carboxylate-substituted benzoimidazole and formate ligands: [Mn(L)·(HCO2)] n (1) and [Co(L)·(HCO2)] n (2) (L = benzoimidazol-1-yl-acetate). Complexes 1 and 2 are isomorphous and adopt a new 3,6-connected three-nodal topology showing interesting magnetic properties: spin canted antiferromagnetism for MnII complex 1, but simple antiferromagnetic coupling for CoII complex 2.

关键词： carboxylate-substituted benzoimidazole formate magnetic property synthesis structure

Synthesis and evaluation of some new oxazolones and imidazolones as antioxidant additives for Egyptian lubricating oils

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2012年第3期9卷 389-399页

作者： Ahmed El-Mekabaty Osman M.O.Habib Hussein M.Hassan Evelin B.Moawad Department of Chemistry Faculty of ScienceMansoura University

Oxazolone derivative 2 was utilized as a key intermediate for synthesis of some new oxazolone and imidazolone derivatives. Reaction of oxazolone derivative 2 with diamines under different conditions afforded the corresponding imidazolone derivatives 3-8, respectively. Moreover, oxazolone 2 reacted with some heterocyclic amines in glacial acetic acid giving the corresponding imidazolone derivatives 9-14, respectively. Cyclocondensation of thiosemicarbazide with compound 2 in dry pyridine afforded compound 15. Addition of secondary amines to olefin double bond of compound 2 gave the corresponding addition products 16-19, respectively. Michael addition of compound 2 with some active methylene compounds afforded oxazolone derivatives 20-23, respectively. These prepared products were evaluated as antioxidant and corrosion inhibitors for gasoline lubricating oil and compounds 6a-e, 10 and 15 exhibited the highest antioxidant and anticorrosive activities. The effect of concentration of additives was studied to recommend the optimum concentration to be used. The results showed, for additive 15, 0.1 g for 1 L oil was the more effective concentration. Measurements for thermal analysis and of surface tension of oil after oxidation were also carried out.

关键词： Oxazolone imidazolone benzoimidazole surface tension thermal stability antioxidant additives.

Efficient synthesis and in vitro antifungal activity of 1H-benzimidazol-l-yl acetates/propionates containing 1H-1,2,4-triazole moiety

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2012年第12期23卷 1381-1384页

作者： Pei Zhi Zhang Shao Fang Zhou Tian Ren Li Lin Jiang College of Chemistry and Material Science Shandong Agricultural University

A series of novel 1H-benzimidazol-1-yl acetates and 1H-benzimidazol-1-yl propionates containing 1H-1,2,4-triazole moiety were synthesized under microwave irradiation by multi-step reactions, in yields of 87-94%. Their in vitro antifungal activities against Botrytis cinerea and Sclerotinia sclerotiorum were evaluated by mycelial growth rate method. All the target compounds exhibit high activities against B. cinerea with the EC50 values of 7.96-21.74 μg/mL, higher than that of carbendazim.

关键词： benzoimidazole 1,2,4-Triazole Synthesis Antifungal activity

N-Oxide heterocycles and imidazoles replacing ring D of calanolides against Mycobacterium tuberculosis

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2016年第1期27卷 51-54页

作者： Zi-Jie Liu Xiao-Yong Guo Gang Liu Institute of Materia Medica Chinese Academy of Medical Sciences and Peking Union Medical College Tsinghua-Peking Center for Life Sciences and Department of Pharmacology and Pharmaceutical Sciences School of Medicine Tsinghua University

We have explored the chemistry of N-oxide heterocycles and imidazoles replacing ring D of the natural product（＋）-calanolide A, and have synthesized 12 new analogues, two of which were active against both R Mtb and ... 详细信息

关键词： Mycobacterium tuberculosis (+)-Calanolide A N-Oxide heterocycle benzoimidazole Bioreductive drug

A highly sensitive colorimetric and ratiometric sensor for fluoride ion

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2008年第11期19卷 1353-1357页

作者： ZhaoWu Xu Jin Tang He Tian Key Labs for Advanced Materials and Institute of Fine Chemicals East China University of Science and Technology Shanghai 200237 PR China

A new benzoimidazole-naphthalimide derivative 4 was synthesized and its photophysical properties were studied. This compound showed highly selectively and sensitive colorimetric and ratiometric sensing ability for flu... 详细信息

关键词： Naphthalimide benzoimidazole Fluoride sensor