title: 3',7',7'-Trimethyl-1'-phenyl-5',6',7',8'-tetra-hydro-spiro-[indoline-3,4'-(1H,4H-pyrazolo-[3,4-b]chromene)]-2,5'-dione.
abstract: The title spiro-oxindole compound, C(26)H(23)N(3)O(3), was prepared by the reaction of isatin, 3-methyl-1-phenyl-2-pyrazolin-5-one and 5,5-dimethyl-cyclo-hexane-1,3-dione in an ethanol solution. The fused cyclo-hexene ring adopts an envelope conformation. The dihedral angle between the aromatic and pyrazoline rings is 23.70 (8)°. An intra-molecular C-H⋯O inter-action occurs. The crystal structure is stabilized by N-H⋯N hydrogen-bonding inter-actions, leading to a zigzag chain along the b axis.
authors: Department of Chemistry, Jinan University, Guangzhou 510632, People's Republic of China.
authors: Li-Qin
authors: LQ
authors: Zhao
authors: Bin
authors: B
authors: Li
authors: Yi-Qun
authors: YQ
authors: Li
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