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The title compound 2-amino-3-ethoxycarbonyl-4-(4-chlorophenyl)-4H,5H-pyrano- [3,2-c]-benzopyran-5-one (C21H16ClNO5, Mr = 397.80) has been synthesized and characterized by X-ray crystallography. It crystallizes in triclinic, space group P1 with a = 5.756(1), b = 10.099(1), c = 17.106(3) ? a = 80.49(1), b = 83.13(1), g = 80.07(1), V = 961.8(2) ?, Dc = 1.374 g/cm3, = 0.231 mm-1, Z = 2, F(000) = 412, the final R = 0.0369 and wR = 0.0947. In the molecule the pyran ring is of boat conformation. The intermolecular hydrogen bonds of NH…O(5)(x+2, y+1, z+1) and NH…Cl (x+1, y1, z) as well as intramolecular hydrogen bond NH…O(5) are found.
The title compound 2-amino-3-ethoxycarbonyl-4- (4-chlorophenyl) -4H, 5H-pyrano- [3,2-c] -benzopyran-5-one (C21H16ClNO5, Mr = 397.80) has been synthesized and characterized by X-ray crystallography. It crystallizes in triclinic space group P1 with a = 5.756 (1), b = 10.099 (1), c = 17.106 (3)? a = 80.49 (1), b = 83.13 D = 1.374 g / cm3, = 0.231 mm-1, Z = 2, F (000) = 412, the final R = 0.0369 and wR = 0.0947. the molecule the pyran ring is of boat conformation. The intermolecular hydrogen bonds of NH ... O (5) (x + 2, y + 1, z + 1) and NH ... Cl (x + 1, y1, z) intramolecular hydrogen bond NH ... O (5) are found.