The intramolecular C–H/C–H coupling of 3-aryloxythiophenes and 3-aryloxybenzo[b]thiophenes has been found to occur effectively in the presence of Pd(TFA)2 and AgOAc as catalyst and oxidant, respect...
Structure–reactivity relationships in bithiophenic precursors based on the 3-phenoxythiophene building block
作者:Philippe Leriche、Pierre Frère、Jean Roncali
DOI:10.1039/b502164b
日期:——
3-Toluoxythiophene and bithiophenes diversely substituted by toluoxy groups have been synthesized. Theoretical, spectroscopic and electrochemical studies show that the number and position of the phenoxy groups exert a strong influence on the geometry of the ground state and cation radical and determine the reactivity of the latter and hence its aptitude for electropolymerization.
The invention concerns novel heterocyclic nitromethane derivatives of the formula 1 as defined hereinafter (and their non-toxic salts) wherein the heterocyclic moiety Q may bear a wide variety of optional substituents, together with pharmaceutical compositions containing them. The nitromethane derivatives are inhibitors of the enzyme aldose reductase and are of value in the treatment of certain complications of diabetes and galactosemia. The invention further concerns novel processes for the manufacture and use of said inhibitors.