Cycloaddition dipolaire −1,3 sur des 2H-pyrroles: synthèse de quelques dérivés de pyrazolino- et isoxazolino- [5,6-e] pyrroles

Abstract The reaction of the diphenylnitrilimine and phenylnitriloxide with 2H-pyrroles 1a,b leads to title compounds. The 1,3-dipolar cycloaddition occurs only across the carbon nitrogen double bond. The reaction is completely regioselective and partly diastereoselective.