SYNTHESIS OF NOVEL 3-SPIRO INDOLINES CONTAINING BENZ(G) INDAZOLE, BENZ(H)PYRAZOLO(3,4-B)QUINOLINE AND NAPHTHISOXAZOL MOIETIES

1, 3-Dihydro-3-(3, dihydro-1-oxonaphthalenyl-2-idene)-2H-indol-2-ones were condensed with phenyl hyrazine, 3-Amino-1-phenyl-2-pyrazolin-5-on e and hydroxylamine hydrochloride to obtain novel 3, 3a, 4, 5-tetrahyd rospiro [2H-benz(g)indazole-3, 3'(3H)-indol]-2'-( 1H)-one, 3'a, 4'a, 5 ', 6'-tetrahydro-2'-phenyl spiro [3H-indole-3, 4'-benz(h)-[4H]pyrazolo [3, 4b]quinoline]-2(1H), 3'-dione and 4, 5-dihydro-spiro[3H-indole-3, 3'[3aH]-2, 1-naphthisoxazol-2(1H)-ones respectively. Structural assign ments have been made on the basis of analytical and spectral data.