SOLVENT-FREE REGIOSELECTIVE SYNTHESIS OF NOVEL ISOXAZOLINE AND PYRAZOLINE <i>N</i>-SUBSTITUTED SACCHARIN DERIVATIVES UNDER MICROWAVE IRRADIATION
DOI:
https://doi.org/10.1007/2681Keywords:
arylnitrile oxide, nitrile imine, catalysis, 1, 3-dipolar cycloaddition, microwave irradiation, solvent-freeAbstract
Novel isoxazoline and pyrazoline derivatives of N-substituted saccharin were synthesized in good yields by 1,3-dipolar cycloaddition of N-crotonoyl- or N-cinnamoylsaccharin as dipolarophile to arylnitrile oxides or nitrile imines using p-HAP300 as catalyst under solvent-free microwave conditions. In this process, the yields were significantly improved compared to classical conditions without alteration of the selectivity. The regioselectivity as well as the nonthermal specific microwave effect are discussed.
How to Cite
Saber, A.; Driowya, M.; Alaoui, S.; Marzag, H.; Demange, L.; Álvarez, E.; Benhida, R.; Bougrin, K. Chem. Heterocycl. Compd. 2016, 52, 31. [Khim. Geterotsikl. Soedin. 2016, 52, 31.]
For this article in the English edition see DOI 10.1007/s10593-016-1828-4