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6a-Nitro-6-(2,2,7,7-tetra-methyl-tetra-hydro-3aH-bis-[1,3]dioxolo[4,5-b:4',5'-d]pyran-5-yl)-6a,6b,7,8,9,11a-hexa-hydro-6H-spiro-[chromeno[3,4-a]pyrrolizine-11,11'-indeno-[1,2-b]quinoxaline].

ABSTRACT: In the title compound, C39H38N4O8, the quinoxaline and indene subunits are essentially planar, with maximum deviations of 0.071?(2) and 0.009?(2)?Å, respectively. The indeno-quinoxaline system forms a dihedral angle of 72.81?(3)° with the chromenopyrrolizine system. The two dioxolane rings, as well as the pyran ring of the chromeno group and the terminal pyrrolizine, each adopt an envelope conformation with O and C as flap atoms. The central pyrrolizine ring adopts a twisted conformation. Intra-molecular C-H?O and C-H?N hydrogen bonds occur. The crystal structure exhibits C-H?O hydrogen bonds, and is further stablized by C-H?? inter-actions, forming a two-dimensional network along the bc plane.

SUBMITTER: Anuradha T

PROVIDER: S-EPMC3914082 | biostudies-other | 2014 Jan

REPOSITORIES: biostudies-other

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6a-Nitro-6-(2,2,7,7-tetra-methyl-tetra-hydro-3aH-bis-[1,3]dioxolo[4,5-b:4',5'-d]pyran-5-yl)-6a,6b,7,8,9,11a-hexa-hydro-6H-spiro-[chromeno[3,4-a]pyrrolizine-11,11'-indeno-[1,2-b]quinoxaline].

Anuradha T T Naga Siva Rao J J Seshadri P R PR Raghunathan R R

Acta crystallographica. Section E, Structure reports online 20131214 Pt 1

In the title compound, C39H38N4O8, the quinoxaline and indene subunits are essentially planar, with maximum deviations of 0.071 (2) and 0.009 (2) Å, respectively. The indeno-quinoxaline system forms a dihedral angle of 72.81 (3)° with the chromenopyrrolizine system. The two dioxolane rings, as well as the pyran ring of the chromeno group and the terminal pyrrolizine, each adopt an envelope conformation with O and C as flap atoms. The central pyrrolizine ring adopts a twisted conformation. Intra- ...[more]

PMID: 24526984

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