This paper focuses on the synthesis of a wide variety of di benzo spiro bis-crown compounds,
in good yields using di-phenols, mono tosylates of oligoethylene glycols and caesium carbonate
in acetonitrile.
Cyclophane-type macrocyclic compounds from 21 to 56 members having two fused dihydrofuran rings were synthesized by the manganese(III)-mediated oxidation of terminal dienes with bis(3-oxobutanoate)s containing aromatics. The reaction detail, characterization and reaction pathways are described.
Guest-induced stereoselective self-assembly of quinoline-containing Pd<sup>II</sup> and Pt<sup>II</sup> metallacycles
作者:Víctor Blanco、Dolores Abella、Tamara Rama、Cristina Alvariño、Marcos D. García、Carlos Peinador、José M. Quintela
DOI:10.1039/c6ra14909j
日期:——
A family of mono- and dinuclear metallacycles has been self-assembledfrom (en)M(NO3)2 metal centers (M = PdII or PtII) and 4,4'-bipyridinium/2,7-diazapyrenium-based ligands incorporating quinoline subunits in their structures. These receptors...
[EN] DENTAL COMPOSITION AND USE THEREOF<br/>[FR] COMPOSITION DENTAIRE ET SON UTILISATION
申请人:3M INNOVATIVE PROPERTIES CO
公开号:WO2015126862A1
公开(公告)日:2015-08-27
The invention relates to a dental composition comprising polymerizable monomer (1), initiator component(s), filler component(s) in an amount of more than about 20 wt.-%, wt.-% with respect to the whole weight of the composition, the polymerizable monomer (1) being characterized as follows: having exactly two (meth)acrylate reactive moieties, having an unsymmetrical backbone as linkage between the (meth)acrylate reactive moieties, the two (meth)acrylate reactive moieties being attached onto the unsymmetrical monomer backbone as alkyl esters, the unsymmetrical backbone comprising one aromatic moiety of the phenolic type, the polymerizable monomer (1) not containing an acidic moiety, other atoms than carbon, hydrogen, and oxygen, bisphenol moieties. The invention also relates to the use of the dental composition as or for producing a dental filling material, crown and bridge material, inlay, onlay, veneer or dental mill blank.
A newclass of flavonoids bearing cyclic polyethers involving a phenyl ring was conveniently provided by the intramolecular photochemical dimerization of 2-chromonecarboxylic esters. Irradiation of 2-chromonecarboxylate with a polyether tethered at both ends promoted intramolecular [2 + 2] cyclobutane formation leading to 14- to 27-membered cyclic polyethers. The efficiency depended on the substituted