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The title compound methyl (7,7-dimemyl-2-amino-4-(4-chlorophenyl)-5-oxo-5,6,7,8-tetrahydro-4H-benzo-[b]-pyran-3-yl) carboxylate (C19H20ClNO4, Mr = 361.81) was synthesized and crystallized. The crystal belongs to triclinic, space group P 1 with a = 8.519(2), b = 10.346(2), c = 11.481(3) A, α = 108.16(1), β = 107.78(2), γ= 91.83(2)°, Z = 2, V = 906.5(3) A3, Dc = 1.326 g/cm3, μ(MoKα) = 0.234 mm-1, F(000) = 380, R = 0.0467 and wR = 0.1270 for 3142 observed reflections (I > 2σ(I)). X-ray analysis reveals that the C(7), C(8), C(9), O(1), C(10) and C(11) atoms form a six-membered ring which adopts a boat conformation. In the ring, the distances of C(8)-C(9) and C(10)-C(11) are 1.332(3) and 1.357(3) A, respectively, which indicates that they are C=C double bonds. Another six-membered ring (C(8)-C(9)-C(15)-C(14)-C(13)-C(12)) adopts the half-chair confonnation. In addition, there are intermolecular hydrogen bonds in the crystal structure.
The title compound methyl (7,7-dimemyl-2-amino-4- (4-chlorophenyl) -5-oxo-5,6,7,8- tetrahydro-4H-benzo- [b] -pyran-3-yl The crystal belongs to triclinic, space group P 1 with a = 8.519 (2), b = 10.346 (2), c = 11.481 (3) A, α = 108.16 (1) β = 107.78 (2) γ = 91.83 (2) ° Z = 2 V = 906.5 (3) A3 Dc = 1.326 g / cm3 MoKα = 0.234 mm-1 F 000) = 380, R = 0.0467 and wR = 0.1270 for 3142 observed reflections (I> 2σ (I)). X- ray analysis reveals that the C (7), C C (10) -C (10) -C (10) -C (11) atoms form a six-membered ring which holds a boat conformation. (6) are 1.332 (3) and 1.357 (3) A, respectively, which indicates that they are C = C double bonds. Another six- membered ring (C C (13) -C (12)) adopts the half-chair confonnation. In addition, there are intermolecular hydrogen bonds in the crystal structure.