Spiro Heterocycles. Part-XIX. Synthesis and Insecticidal Activity of some New Fluorine-containing Spiro[ 4H-1-benzo- pyran-4,3-[3H]-indole]-3- carbonitriles/carboxyethylesters

Department of Chemistry, University of Rajasthan, Jaipur-302 004 Manuscript received 16 January 1989, revised 28 November 1989, accepted 5 February 1990 A number of fluorinated spiro[4H-1-benzopyran-4,3'-[3H]indole]-3-carbonitriles/ carboxyethylesters have been synthesised and tested for their insecticidal activity against Prodenja litura and Musca domestica. The structures of the compounds were confirmed by elemental analysis, ir, pmr and mass spectral studies