Author/Authors :
P. Conti، نويسنده , , A. Pinto، نويسنده , , L. Tamborini، نويسنده , , V. Rizzo، نويسنده , , C. De Micheli، نويسنده ,
Abstract :
The regioselective synthesis of 5-substituted-3-dimethoxyphosphono-pyrazoles and -2-pyrazolines has been accomplished through the 1,3-dipolar cycloaddition of a suitable nitrile imine to monosubstituted alkynes and alkenes. Examples of hydrolysis of the heterocyclic phosphonic esters to the corresponding acids are described.
