The title compound, C(24)H(26)N(4)O(4), is a diaza-crown ether encompassing linked phenylpyrazolyl and benzimidazole units that contribute five atoms to the 16-atom ring. The two planar phenylpyrazolyl and benzimidazole units are aligned at an angle of 66.4 (1)°. The carbonyl O atom of the benzimidazole unit is directed away from the middle of the ring.
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http://dx.doi.org/10.1107/S1600536809037131 | DOI Listing |
Acta Crystallogr Sect E Struct Rep Online
September 2009
The title compound, C(24)H(26)N(4)O(4), is a diaza-crown ether encompassing linked phenylpyrazolyl and benzimidazole units that contribute five atoms to the 16-atom ring. The two planar phenylpyrazolyl and benzimidazole units are aligned at an angle of 66.4 (1)°.
View Article and Find Full Text PDFArch Pharm (Weinheim)
March 2003
Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, Cairo, Egypt.
A series of compounds comprising the thiocarboximidopyrazolyl 5, the phenylpyrazolyl 6, the dimethylpyrazolyl 7, the nitrophenylpyrazolyl 8, the dimethyloxazolyl 9, the benzoxazepinyl 10, and pyrimidyl 11 a-c derivatives of 3-(2-methyl-1H-benzimidazol-5-ylazo)pentane-2, 4-dione was synthesized. Moreover, 5-amino-2-methylbenzimidazole (3) was reacted with phthalic anhydride or maleic anhydride in acetic acid or in toluene to produce 12-15. Treating 5, 6-diamino-2-methylbenzimidazole (16) with ethyl cyanoacetate or diethyl malonate or acetyl acetone leads to the formation of the benzodiazepine derivatives 17-20.
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