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Ethyl 2-amino-7,7-dimethyl-2',5-dioxo-spiro-[5,6,7,8-tetra-hydro-4H-chromene-4,3'(2'H)-1H-indole]-3-carboxyl-ate.

ABSTRACT: In the mol-ecule of the title compound, C(21)H(22)N(2)O(5), the indole system and the spiro-pyran ring are almost planar [maximum deviations of 0.0447?(17) and 0.0781?(17)?Å, respectively]; the dihedral angle between them is 84.6?(3)°. The remaining six-membered ring adopts a twisted conformation. Intra-molecular N-H?O hydrogen bonds occur. In the crystal structure, intera-molecular N-H?O and C-H?O hydrogen bonds link the mol-ecules.

SUBMITTER: Wang J

PROVIDER: S-EPMC2979861 | biostudies-other | 2010

REPOSITORIES: biostudies-other

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Ethyl 2-amino-7,7-dimethyl-2',5-dioxo-spiro-[5,6,7,8-tetra-hydro-4H-chromene-4,3'(2'H)-1H-indole]-3-carboxyl-ate.

Wang Jing J Zhu Song-Lei SL

Acta crystallographica. Section E, Structure reports online 20100109 Pt 2

In the mol-ecule of the title compound, C(21)H(22)N(2)O(5), the indole system and the spiro-pyran ring are almost planar [maximum deviations of 0.0447 (17) and 0.0781 (17) Å, respectively]; the dihedral angle between them is 84.6 (3)°. The remaining six-membered ring adopts a twisted conformation. Intra-molecular N-H⋯O hydrogen bonds occur. In the crystal structure, intera-molecular N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules. ...[more]

PMID: 21579735

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