A convenient synthesis of novel 7-phosphonylbenzyl-2-substituted pyrazolo[4,3-<i>e</i>]-1,2,4-triazolo[1,5-<i>c</i>]-pyrimidine derivatives
作者:Lin-Xia Xiao、Ke Li、Liu Meng、De-Qing Shi
DOI:10.1002/hc.20478
日期:2008.9
A series of pyrazolo[4,3-e]-1,2,4-triazolo-[1,5-c]pyrimidine derivatives, bearing phosphonylbenzyl chain in position 7, were conveniently synthesized in an attempt to obtain potent and selective antagonists for the A2A adenosine receptor or potent pesticide lead compounds. Diethyl[(5-amino-4-cyano-3-methylsulfanyl-pyrazol-1-yl)-benzyl]phospho-nate (3), which was prepared by the cyclization of diethyl
Stereoselective synthesis and biological activities of diethyl (<i>E</i>)-{[4-cyano-5-[[(disubstitutedamino)methylene]amino]-3-(methylthio)- 1<i>H</i>-pyrazol-1-yl]substituited phenylmethyl}phosphonates
作者:Lin-Xia Xiao、De-Qing Shi
DOI:10.1002/jhet.97
日期:2009.5
Diethyl [5-amino-4-cyano-3-(methylthio)-1H-pyrazol-1-yl]substitutedphenylmethyl}phosphonates were efficiently synthesized via the condensation of [(1-hydrazino)substitutedphenylmethyl]phosphonates with 2-[bis(methylthio)methylene]malononitrile . reacted with triethyl orthoformate to afford diethyl (E)-[4-cyano-5-[(ethoxymethylene)amino]-3-(methylthio)-1H-pyrazol-1-yl]substitutedphenylmethyl}phosphonates