2,5,8-Tris(diphenylphosphoryl)- and 2,5,8-tris(diphenylthiophosphoryl)-2,3,4,5,6,7,8,9-octahydro-1H-cyclopent[e]-asym-indacene-2,5,8-tricarbonitriles as a novel type of polycondenced systems

The interaction of phosphorylacetonitriles and thiophosphorylacetonitriles with hexakis(bromomethyl)benzene proceeds under phase-transfer catalysis conditions as exhausting cycloalkylation to form 2,5,8-tris(diphenylphosphoryl)- and tris(diphenylthiophosphoryl)- 2,3,4,5,6,7,8,9-octahydro-1H-cyclopent[e]-asym-indacene-2,5,8-tricarbonitriles (tris-phosphorylated trindans).