SYNTHESIS AND SPECTRAL CHARACTERIZATION OF 1,n- (ALKANE-1,n-DIYL)BIS-(3-PHENYLHYDRAZONO (HYDROXYIMINO)-INDOLIN-2-ONE DERIVATIVES.

1,n-(alkane-1,n-diyl)-bis-3-phenylhydrazono(hydroxyimino)-indolin-2- ones 12-17 have been synthesized from isatin. Thus, the condensation of isatin 1 with dibromoalcanes under liquid-solid phase transfer catalysis (PTC) conditions affords 1,n-bis-(isatin)alkanes which reacted with phenylhydrazine and hydroxylamine hydrochloride in refluxing ethanol. The structures of all compounds synthesized have been characterized by using ¹H NMR and 13C NMR spectroscopy. [ABSTRACT FROM AUTHOR]