The new compounds 2-[4-(6-cyanobenzothiazol-2-yl)phenyl]-5-(6-cyano-benzothiazol-2-yl)furan (6a) and 2-[4-(6-Cyanobenzothiazol-2-yl)phenyl]-5-(6-cyano-benzothiazol-2-yl)thiophene (6b) were synthesized by multi-step reactions from the corresponding 2-furan and 2-thiophene carboxaldehydes (route A), as well as from 2-furan and 2- thiophene carboxylic acids (route B). Route B involves one less step than route A, but the overall yields of the reactions are considerably lower.
Suzuki cross-coupling reactions using reverse-phase glass beads in aqueous media
作者:Kokovi M. Lawson Daku、Roger F. Newton、Simon P. Pearce、Julia Vile、Jonathan M.J. Williams
DOI:10.1016/s0040-4039(03)01128-6
日期:2003.6
Reverse-phase glass beads have been employed in Suzuki reactions to provide, in aqueous media, a route to diverse polar substrates in good yield and with low levels of palladium leaching. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of Substituted 1,3,4-Oxadiazoles Under Microwave Irradiation
作者:Xicun Wang、Juan Liu、Zheng Li
DOI:10.1080/10426500500269877
日期:2006.3.1
A series of substituted 1,3,4-oxadiazoles were synthesized by the cyclization of 2,6-pyridine dicarboxylic acid, 5-(4'-carboxyl-phenyl)-2-furanylcarboxylic acid, or p-phthalic acid, and aryl hydrazines in the presence of phosphorus oxychloride under the condition of microwave irradiation.