نتایج جستجو برای: oxadiazoles

تعداد نتایج: 517  

Journal: :Journal of Molecular Modeling 2021

In this study, 32 energetic compounds were designed using oxadiazoles (1,2,5-oxadiazole, 1,3,4-oxadiazole) as the parent by inserting different groups well changing bridge between parent. These had high density and excellent detonation properties. The electrostatic potentials of analyzed functional theory (DFT). structure, heat formation (HOF), density, performances (detonation pressure P, velo...

2009
Jun Hu Xiaoyun Gong Ruji Wang Yong Ju

The title compound, C(37)H(50)N(2)O(3), is a benzyl ester derivative of oleanolic acid, a penta-cyclic triterpene, with a five-membered oxadiazole ring fused to the ring A. The triterpene A and C rings adopt slightly distorted half-chair conformations, whereas the remaining three six-membered rings are in chair forms.

Journal: :Chemical communications 2004
Seung Yeul Ryu Sehoon Kim Jangwon Seo Young-Woon Kim Oh-Hoon Kwon Du-Jeon Jang Soo Young Park

Supramolecular aggregation of a novel nonfluorescent gelator yields highly luminescent organogels in aprotic organic solvents through intermolecular hydrogen bonding, which is a key motif for both self-assembly and photophysical process control.

Journal: :Organic & biomolecular chemistry 2010
Alan R Burns Jennifer H Kerr William J Kerr Joanna Passmore Laura C Paterson Allan J B Watson

The addition of various nucleophiles to a vinyl 1,2,4-oxadiazole is described. Following optimisation, individual protocols tuned for the use of each specific class of reagent have been developed to allow the installation of nitrogen, sulfur, oxygen, and carbon nucleophiles, and leading to the preparation of a series of compounds containing the pharmaceutically important oxadiazole motif.

2002
Chris Richardson Peter J. Steel Deanna M. D’Alessandro Peter C. Junk F. Richard Keene

The syntheses of two new ligands, 3,4-di(2-pyridyl)-1,2,5-oxadiazole (dpo) and 3,4-di(2-pyridyl)-1,2,5-thiadiazole (dpt), are described. Complexes with palladium and copper have seven-membered chelate rings with coordination through the two pyridine nitrogens, whereas in the silver nitrate complex of dpt the ligand acts as a bridge between metal centres. Studies of the mononuclear ruthenium com...

Journal: :Angewandte Chemie 2021

An iridium-catalyzed reductive three-component coupling reaction for the synthesis of medicinally relevant α-amino 1,3,4-oxadiazoles from abundant tertiary amides or lactams, carboxylic acids, and (N-isocyanimino) triphenylphosphorane, is described. Proceeding under mild conditions using (<1 mol %) Vaska's complex (IrCl(CO)(PPh3)2) tetramethyldisiloxane to access key reactive iminium ion interm...

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