An efficient protocol using copper based reagents for the coupling of aryl halides with phenols to generate diaryl ethers is described. A copper(I) complex, [Cu(CH3CN)4]ClO4, or the readily available copper(II) source, CuCO3·Cu(OH)2·H2O (in combination with potassium phosphate), can be used. Aryl halides and phenols with different steric and electronic demands have been used to assess the efficiency of the procedure. The latter source of copper gives better yields under all conditions.
Substituted (2-phenoxyphenyl)acetic acids with antiinflammatory activity. 1
作者:David C. Atkinson、Keith E. Godfrey、Bernard Meek、John F. Saville、Michael R. Stillings
DOI:10.1021/jm00364a004
日期:1983.10
The synthesis and antiinflammatoryactivity of a series of substituted (2-phenoxyphenyl)acetic acids are described. Initial screening in the adjuvant arthritis test showed that halogen substitution in the phenoxy ring enhanced activity considerably. Ulcerogenic potential, as measured by the minimum ulcerogenic dose (MUD), was low in almost all the acids tested. [2-(2,4-Dichlorophenoxy)phenyl]acetic
Facile and Reliable Synthesis of Tetraphenoxyborates and Their Properties
作者:Itamar M. Malkowsky、Roland Fröhlich、Ulrich Griesbach、Hermann Pütter、Siegfried R. Waldvogel
DOI:10.1002/ejic.200600074
日期:2006.4
Tetraphenoxyborates are reliably prepared in a two-step sequence, exploiting less corrosive reagents like boric acid and the corresponding phenols. The broad scope of this transformation is demonstrated in 22 examples. Several solid-state structures reveal the preferential conformation of the phenoxy moieties allowing cation interaction. Furthermore, a novel architecture of a phenoxy-substituted tetraborate
A convenient enantioselective synthesis of trans-2-aryloxycyclohexan-1-ols using pig liver acetone powder (PLAP) as biocatalyst
作者:Deevi Basavaiah、Peddinti Rama Krishna、Tirumala K Bharathi
DOI:10.1016/0957-4166(95)00029-o
日期:1995.2
Pig liveracetonepowder (PLAP) has been used as a biocatalyst for enantioselective hydrolysis of racemic trans-1-acetoxy-2-aryloxycyclohexannes to produce the resulting (R,R)-2-aryloxycyclohexan-1-ols upto >99% enantiomeric purities. (R,R)-Selectivity in this hydrolysis of racemic trans-2-aryloxycyclohexyl acetates was explained on the basis of Jones' three dimensional active site-model.
Solvent-dependent ambident nucleophilicity of phenoxide ion towards nitroporphyrins: synthesis of 2-hydroxyaryl- and 2-aryloxy-5,10,15,20-tetraphenylporphyrins by displacement of a nitro group
作者:Maxwell J. Crossley、Lionel G. King、Janelle L. Simpson
DOI:10.1039/a701673e
日期:——
the major product and none of the meta isomer is detected. The scope of the reaction has been extended by the use of the substituted phenols which are blocked from reaction para to the hydroxy (p-cresol and 2,4-dimethylphenol) or blocked from reaction in the ortho-positions (2,6-dimethylphenol). In this way the copper(II) 2-(2-hydroxy-5-methylphenyl)porphyrin 14 (86%), 2-(2-hydroxy-5-methylphenyl)porphyrin