Abstract
Adsorbed on porous calcium hydroxyapatite, 1,3‐dipolar cycloaddition of diphenylnitrilimine on olefins is readily catalyzed under solvent‐free microwaves irradiation. The pyrazolines are obtained in few minutes with high yields. Specific surface of porous calcium hydroxyapatite and microwaves effects are discussed.
Acknowledgments
Financial assistance of Ministry of Education, Government of Morocco (PROTARS III, D13/57) and CNRST‐Morocco are gratefully acknowledged.