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.
<i>N</i>,<i>N</i>-Dimethyl Glycine-Promoted Ullmann Coupling Reaction of Phenols and Aryl Halides
作者:Dawei Ma、Qian Cai
DOI:10.1021/ol0350947
日期:2003.10.1
[reaction: see text] Ullmann-type diaryl ether synthesis can be performed at 90 degrees C using either aryl iodides or aryl bromides as the substrates under the assistance of N,N-dimethylglycine.
Cu(phen) complexes were observed in the copper(i)-catalyzed C–O coupling reaction using K2CO3 as the base and phen as the ligand under the catalytic reaction conditions by in situ electrospray ionization mass spectrometry (ESI-MS) and EPR analysis.
COMPOSITION FOR AGRICULTURAL USE FOR CONTROLLING OR PREVENTING PLANT DISEASES CAUSED BY PLANT PATHOGENS
申请人:Matsuzaki Yuichi
公开号:US20110009454A1
公开(公告)日:2011-01-13
Disclosed is a composition for agricultural use, which is used for controlling or preventing plant diseases caused by plant pathogens. The composition for agricultural use contains a compound represented by formula (1), a salt thereof or a hydrate of the compound or the salt. (1) [In the formula, Z represents an oxygen atom, a sulfur atom or NR
Z
; and E represents a furyl group, a thienyl group, a pyrrolyl group, a tetrazolyl group, a thiazolyl group, a pyrazolyl group, a phenyl group or the like.]
[EN] COMPOUND HAVING PROTEIN TYROSINE PHOSPHATASE SHP-1 AGONIST ACTIVITY<br/>[FR] COMPOSÉ PRÉSENTANT UNE ACTIVITÉ AGONISTE DE LA PROTÉINE TYROSINE PHOSPHATASE SHP-1<br/>[ZH] 具有蛋白酪氨酸磷酸酶SHP-1激动剂活性的化合物