New Strong Base Synthesis of Symmetrical 1,5-Diaryl-1,3,5-pentanetriones from Acetone and Benzoate Esters
摘要:
Lithium hexamethyldisilazide (LiHMDS) was used to condense substituted benzoate esters with acetone to afford symmetrical 1,5-diaryl-1,3,5-pentanetriones that were isolated, characterized (including a representative X-ray crystallographic analysis), and acid cyclized to the respective 2,6-diaryl-4H-pyran-4-ones.
Triketonate difluoroboron complexes. Substitution-dependent liquid crystal and photophysical properties
摘要:
Novel alkyloxyphenyl-substituted beta,delta-triketonate difluoroboron complexes have been efficiently synthesised and thoroughly characterised. Significant features such as liquid crystal behaviour and solid and solution fluorescence are observed in all cases. The mesomorphism was determined by the presence of one, two or three alkyl chains in each substituent aromatic group of the triketonate ligand. So, smectic C mesophases were found for compounds carrying two lateral chains, each of thein located at one of each phenyl substituent, while the presence of four or six chains at the whole molecule gave rise to smectic A or discotic lamellar and hexagonal columnar mesophases, respectively. Fluorescence in the solid state and in solution is again proved to be dependent on the ligand substitution as well as to be maintained in the mesophase. These multifunctional materials also present luminescent sensor activity towards Hg2+ and Cu2+. (C) 2015 Elsevier Ltd. All rights reserved.
Some β,δ-triketones and β-diketophenols have been prepared and characterized. A series of mononuclear oxovanadium(IV) adducts with these ligands have been isolated and characterized. All these mononuclear complexes have a free coordination set and may act as ligands towards a second metal ion. The syntheses of dinuclear complexes using the mononuclear ones as ligands are reported. Their stereochemistry
Comparison between d1-d1 and d9-d9 magnetic exchange in binuclear vanadyl and copper(II) 1,3,5-triketonates. Crystal and molecular structure of Cu2(DANA)2(py)2
作者:Mary Jane Heeg、J. L. Mack、M. D. Glick、R. L. Lintvedt
DOI:10.1021/ic50217a040
日期:1981.3
LACAN M.; SUSNIK-RYBARSKI I.; STEFANAC Z.; RADMAN V., GLASNIK XEM. DRUSHT. BEOGRAD <GNDV-AX>, 1974, 39, NO 5-6, 385-393
作者:LACAN M.、 SUSNIK-RYBARSKI I.、 STEFANAC Z.、 RADMAN V.
DOI:——
日期:——
SKARE D.; LACAN M.; MEIC Z., CROAT. CHEM. ACTA <CCAC-AA>, 1975, 47, NO 2, 135-143
作者:SKARE D.、 LACAN M.、 MEIC Z.
DOI:——
日期:——
GRINS G.; WATSON W. H., REV. LATINOAMER. QUIM., 1976, 7, NO 1, 31-33