1,3-Dipolar cycloaddition on 2H-pyrroles: The synthesis of some derivatives of pyrazolino- and isoxazolino[5,6-e]pyrroles

Article abstract of DOI:10.1016/S0040-4039(00)79774-7

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 diastereos