Synthesis and reactions of 5-aryl-2-thiophenecarbaldehydes
摘要:
The reaction of 2-thiophenecarbaldehyde with arene diazonium chlorides in the presence of CuCl2 catalyst gave 5-aryl-2-thiophenecarbaldehydes. Use of 4-nitrobenzene diazonium chloride in the reaction also gave the isomeric 3-(4-nitrophenyl)-2-thiophenecarbaldehyde. Condensation products of the 5-aryl-2-thiophenecarbaldehydes with cyanoacetic acid esters, cyanoacetamide, and with barbituric and dimethylbarbituric acids were prepared.
Novel Glycopeptide Antibiotics: N-Alkylated Derivatives Active Against Vancomycin-Resistant Enterococci.
作者:MICHAEL J. RODRIGUEZ、NANCY J. SNYDER、MARK J. ZWEIFEL、STEPHEN C. WILKIE、DOUGLAS R. STACK、ROBIN D.G. COOPER、THALIA I. NICAS、DEBORAH L. MULLEN、THOMAS F. BUTLER、RICHARD C. THOMPSON
DOI:10.7164/antibiotics.51.560
日期:——
naturally-occurring glycopeptide antibiotic, differing fromvancomycin in the stereochemistry of the amino-sugar of the disaccharide function, and the presence of a third sugar attached at the benzylic position of amino acid residue 6. Despite these seemingly subtle differences, LY264826 is approximately 10 times more active than vancomycin against the enterococci. In the pursuit of new antibiotics active against multiresistant
Synthesis and reactions of 5-aryl-2-thiophenecarbaldehydes
作者:M. D. Obushak、V. S. Matiychuk、R. Z. Lytvyn
DOI:10.1007/s10593-008-0135-0
日期:2008.8
The reaction of 2-thiophenecarbaldehyde with arene diazonium chlorides in the presence of CuCl2 catalyst gave 5-aryl-2-thiophenecarbaldehydes. Use of 4-nitrobenzene diazonium chloride in the reaction also gave the isomeric 3-(4-nitrophenyl)-2-thiophenecarbaldehyde. Condensation products of the 5-aryl-2-thiophenecarbaldehydes with cyanoacetic acid esters, cyanoacetamide, and with barbituric and dimethylbarbituric acids were prepared.