Five-Membered 2-Methylene-2,3-dihydro Heterocycles from Ruthenium Butatrienylidene Intermediates and 2-(Dimethylamino)methyl-Substituted Furans, Thiophenes, and Selenophenes
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چکیده
منابع مشابه
2-Hetaryl-1,3-tropolones based on five-membered nitrogen heterocycles: synthesis, structure and properties
A series of derivatives of 2-hetaryl-1,3-tropolone (β-tropolone) was prepared by the acid-catalyzed reaction of 2-methylbenzoxazoles, 2-methylbenzothiazoles and 2,3,3-trimethylindoline with 3,4,5,6-tetrachloro-1,2-benzoquinone. The molecular structures of the three representative compounds were determined by X-ray crystallography. In crystal and (as shown by the DFT PBE0/6-311+G** calculations)...
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In this investigation a simple synthetic method for the synthesis of trifluoromethyl-1H-benzo[e][1,2,4]triazolo[1,2-a][1,2,4]triazine-1,3(2H)-diones and (trifluoromethyl)benzo [5,6][1,2,4]triazino[1,2-b]phthalazine-8,13-diones has been developed using urazole or phthalazine and aceteimidoyl chloride derivatives at room temperature under ultrasound irradiations. In the comparison to the conventi...
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A series of benzo[b]furan derivatives having a five-membered heterocyclic substituent at the 2-position were prepared from 2-(1-chloro-2-formylvinyl)benzo[b]furans (2) and 2-(4-alkylcarbamoylbuta-1,3-dienyl)benzo[b]furans. These 2-heterocyclic benzo[b]furans were evaluated for their cysteinyl leukotriene receptor (cysLT1, cysLT2) inhibitory activity. Several compounds showed moderate inhibition...
متن کاملAromatic Electronic Delocalization of Benzo Derivatives of Five-membered Heterocycles
The aromaticity of some bicyclic heterocycles is discussed with the aid of the configuration analysis of the expansion coefficient matrices and the similarity analysis of the density matrices. The iso-it-electronic [9] annulenyl anion is taken as the aromatic reference compound for all the heterocyclic compounds considered. The restflts are compared with · those previously obtained from conside...
متن کاملCross sections for electron collision with five-membered ring heterocycles
The absolute total cross-section (TCS) for electron scattering from isoxasole, (CH)3NO, molecule has been measured using the linear transmission technique for impact energies ranging from 1 to 400 eV. The measured TCS energy dependence appears typical for highly polar targets; over whole energy range applied, the magnitude of TCS generally decreases as the energy increases. Some narrow features...
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ژورنال
عنوان ژورنال: Organometallics
سال: 2003
ISSN: 0276-7333,1520-6041
DOI: 10.1021/om030317i