`Ph-CH=CHCONH_(2)overset(KOBr)toPhCh=CH-NH_(2)``H_(2)N-UNDERSET(O)underset(||)C-NH_(2)underset(Cl_(2))overset(NaOH)toHN_(2)-NH_(2)``Ph-CequivC-COOHunderset(H_(2)SO_(4),DELTA)overset(HN_(3))toPhCH_(2)COOH`
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