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Chemistry: SYNTHESIS AND CHARACTERIZATION OF 2-ARYL-3-(1,5 -DIMETHYL- 2-PHENYLPYRAZOLONYL ) - 2,3 - DIHYDRO - 1,3 - OXAZEPINF - 4,7 - DIONES VIA SCHIFF BASES

 

SYNTHESIS AND CHARACTERIZATION OF 2-ARYL-3-(1,5 -DIMETHYL- 2-PHENYLPYRAZOLONYL ) - 2,3 - DIHYDRO - 1,3 - OXAZEPINF - 4,7 - DIONES VIA SCHIFF BASES

Obaid H. Abid

Chemistry Department, C ollege of Science University of Baghdad ,

Baghdad - IRAQ Received: 29/4/2001   Accepted: 22/9/2001

ABSTRACT

N- Benzylidene 1,5 - dimethyl - 2 - phenylpyrazolonamines were prepared by condensation of 4 - amino - 1,5 - dimethyl - 2 - phenyl pyrazolon with different aromatic aldehydes . The reaction of these Schiff bases with maleic anhydride in anhydrous benzene afforded 2 - aryl - 3 - (1,5 - dimethyl - 2 - phenylpyrazolonyl ) - 2,3 - dihydro - 1,3 - oxazepine - 4.7 - diones in good yields , which were reacted with pyrrolidine to give maleic N - ( a - hydroxybenzyl) pyrozolonide – pyrrolides .


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