SPIRO[CHROMAN-2,2'-INDOLE]DERIVATIVE AS CYANIDE IONS CHEMOSENSORS

摘要

The invention describes new spiro[chroman-2,2’-indole] derivatives. When compounds of the invention, 1‘,3‘,3,4-tetrahydrospiro[chromen-2,2‘-indoles], are treated with solution containing cyanide ions 3,4-dihydropyrane ring opening occurs resulting in formation of colored 4-nitrophenolate ion, which is detectable colorimetrically.