1,3-Dipolar Cycloaddition of Diethyl Nitromethylphosphonate, via the Nitrile Oxide, to Alkenes and 1-Alkenes. A Convenient One-Pot Synthesis of 3-Diethoxyphosphoryl-4,5-dihydroisoxazoles and 3-Diethoxyphosphorylisoxazoles
A Regioselective Route to 5-Substituted Isoxazole- and Isoxazoline-3-phosphonates
作者:Paola Conti、Andrea Pinto、Lucia Tamborini、Petra Dunkel、Veniero Gambaro、Giacomo Visconti、Carlo De Micheli
DOI:10.1055/s-0028-1083343
日期:2009.2
5-Substituted 3-(diethoxyphosphoryl)isoxazoles and -2-isoxazolines were synthesized regioselectively by 1,3-dipolarcycloaddition of (diethoxyphosphoryl)formonitrile oxide to monosubstituted alkynes and alkenes. By applying this methodology to an N-(tert-butoxycarbonyl)-substituted allylglycine methyl ester, we prepared the precursors of two diastereomeric 3-phosphono-2-isoxazolin-5-yl-substituted
ZHANG, RONGYU;CHEN, JIAN, SYNTHESIS (BRD),(1990) N, C. 817-819
作者:ZHANG, RONGYU、CHEN, JIAN
DOI:——
日期:——
1,3-Dipolar Cycloaddition of Diethyl Nitromethylphosphonate, via the Nitrile Oxide, to Alkenes and 1-Alkenes. A Convenient One-Pot Synthesis of 3-Diethoxyphosphoryl-4,5-dihydroisoxazoles and 3-Diethoxyphosphorylisoxazoles
作者:Rongyu Zhang、Jian Chen
DOI:10.1055/s-1990-27024
日期:——
The one-pot reaction of diethyl nitromethylphosphonate with alkenes or 1-alkynes in the presence of phosphoryl chloride and triethylamine leads to 3-diethoxyphosphoryl-substituted 4,5-dihydroisoxazoles or isoxazoles, respectively, in good yields.