Microwave-assisted cyclocondensation of hydrazine derivatives with alkyl dihalides or ditosylates in aqueous media: syntheses of pyrazole, pyrazolidine and phthalazine derivatives

Direct microwave-assisted syntheses of 4,5-dihydro-pyrazole, pyrazolidine and 1,2-dihydro-phthalazine derivatives from hydrazines and alkyl dihalides or ditosylates were achieved in aqueous alkaline media.