【摘 要】
：
The title compound methyl (7,7-dimethyl-2-amino-4-(4-chlorophenyl)-5-oxo- 5,6,7,8-tetrahydro-4H-benzo-[b]-pyran-3-yl) carboxylate (C19H20ClNO4, Mr = 361.81) was
【机 构】
：
Department of Chemistry
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The title compound methyl (7,7-dimethyl-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 ī with a = 8.519(2), b = 10.346(2), c = 11.481(3) ?, ( = 108.16(1), ( = 107.78(2), ( = 91.83(2)(, Z = 2, V = 906.5(3) ?3, Dc = 1.326 g/cm3, ((MoK() = 0.234 mm-1, F(000) = 380, R = 0.0467 and wR = 0.1270 for 3142 observed reflections (I ( 2((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 conformation. In addition, there are intermolecular hydrogen bonds in the crystal structure.
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