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The title compound 2-amino-5,6-dihydro-4-(3,4-dimethoxyphenyl)-4H-benzo[h]- chromene-3-carbonitrile (C22H20N2O3, Mr = 360.40) was obtained by the reaction of 2-(3,4-dimeth- oxybenzylidene)-1-tetralone and malononitrile in DMF in the presence of KF-montmorillonite. Its structure was confirmed by IR and 1H NMR spectra. The crystal is of monoclinic, space group C2/c with a = 24.101(6), b = 9.146(2), c = 17.238(3) , β = 95.92(2)o, Z = 8, V = 3779.4(14) 3, Dc = 1.267 g/cm3, μ(MoKα) = 0.085 mm-1, F(000) = 1520, R = 0.0409 and wR = 0.0981 for 2043 observed reflections (I > 2σ(I)).
The title compound 2-amino-5,6-dihydro-4- (3,4-dimethoxyphenyl) -4H-benzo [h] chromene-3-carbonitrile (3,4-dimethoxybenzylidene) -1-tetralone and malononitrile in DMF in the presence of KF-montmorillonite. Its structure was confirmed by IR and 1H NMR spectra. The crystal is of monoclinic, space group C2 / c with a = Β = 95.92 (2) o, Z = 8, V = 3779.4 (14) 3, Dc = 1.267 g / cm 3, μ (MoKα) = 0.085 mm-1, F (000) = 1520, R = 0.0409 and wR = 0.0981 for 2043 observed reflections (I> 2σ (I)).