نتایج جستجو برای: phthalazine
تعداد نتایج: 192 فیلتر نتایج به سال:
The condensation of 2-carb-oxy-benzaldehyde with 1,2-phenyl-enediamine unexpectedly yielded the title compound, C(22)H(14)N(2)O(4)·CH(4)O. The benzimidazole ring system is almost perpendicular to the phthalazine ring system, making a dihedral angle of 88.4 (5)°. Inter-molecular O-H⋯N and O-H⋯O hydrogen-bonding inter-actions stabilize the crystal structure.
The copper coordination chemistry of two phthalazine-based ligands of differing steric bulk was investigated. A family of dinuclear complexes were prepared from reactions Of Cu-2(bdptz)(MeCN)(2)](OTf)(2), 1(OTf)(2), where bdptz = 1,4-bis(2,2’-dipyridylmethyl)phthalazine. Treatment of 1(OTf)(2) with NaO2CCH3 afforded the class I mixed-valent compound Cu-2(bdPtZ)(2)](OTf)(3), 2(OTf)(3), by dispro...
A series of 3'-aminospiro[indoline-3,1'-pyrazolo[1,2-b]phthalazine]-2,5',10'-trione derivatives have been synthesized by a one-pot three-component reaction of isatin, malononitrile or ethyl cyanoacetate and phthalhydrazide catalyzed by piperidine under ultrasound irradiation. For comparison the reactions were carried out under both conventional and ultrasonic conditions. In general, improvement...
A variety of functionalized 3,4-benzo-7-hydroxy-2,9-diazabicyclo[3.3.1]non-7-enes were prepared by one-pot cyclizations of 1,3-bis(silyl enol ethers) with quinazolines. The mechanism of the cyclization was studied by B3LYP/6-31G(d) density functional theory computations. The products could be functionalized by Suzuki cross-coupling reactions. The reaction of 1,3-bis(silyl enol ethers) with phth...
Maher A El-Hashash1, Dalal B Guirguis1*, Nayera AM Abd El-Wahed2 and Mohamed A Kadhim3 1Chemistry Department, Faculty of Science, Ain Shams University, Abassia 11566, Cairo, Egypt 2Department of Chemistry of Natural and Microbial Products, Division of Pharmaceutical Industries, National Research Center, El Behos street, Dokki, Egypt 3Chemistry Department, Faculty of Science, Anbar University, Iraq
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