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Ethyl 6'-amino-5'-cyano-2'-methyl-2-oxospiro-[indoline-3,4'-pyran]-3'-carboxyl-ate.

ABSTRACT: In the title compound, C(17)H(15)N(3)O(4), the atoms of the spiro pyran ring are nearly planar with a maximum deviation of 0.0188 (14) Å. The benzene and pyrrole rings make a dihedral angle of 5.71 (6)°. The indole system and the pyran ring are oriented at a dihedral angle of 82.94 (3)°. The crystal structure is stabilized by inter-molecular classical and non-classical N-H⋯O, N-H⋯N and C-H⋯O hydrogen bonds.

SUBMITTER: Wang J

PROVIDER: S-EPMC2979997 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Methyl 6'-amino-5'-cyano-2'-methyl-2-oxospiro-[indoline-3,4'-pyran]-3'-carboxyl-ate.

Project description:In the mol-ecule of the title compound, C(16)H(13)N(3)O(4), the atoms of the spiro pyran ring are nearly planar with a maximum deviation of 0.095?(2)?Å. The indole and pyran rings are oriented at a dihedral angle of 87.3?(9)°. In the crystal, mol-ecules are linked by inter-molecular N-H?N and N-H?O hydrogen bonds.

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Crystal structure and Hirshfeld surface analysis of ethyl 2'-amino-5-bromo-3'-cyano-6'-methyl-2-oxo-spiro-[indoline-3,4'-pyran]-5'-carboxyl-ate.

Project description:The crystal used for structure determination contained, along with the title compound, C17H14BrN3O4, an admixture [0.0324 (11)] of its 7-bromo isomer. The 2,3-di-hydro-1H-indole ring system is nearly planar, while the conformation of the 4H-pyran ring is close to a flattened boat. The mean planes of these fragments form a dihedral angle of 86.67 (9)°. The carboxyl-ate group lies near the plane of 4H-pyran, its orientation is stabilized by an intra-molecular C-H⋯O contact. In the crystal, the mol-ecules are connected into layers by N-H⋯N and N-H⋯O hydrogen bonds. The most important contributions to the crystal packing are from H⋯H (33.1%), O⋯H/H⋯O (16.3%), N⋯H/H⋯N (12.1%), Br⋯H/H⋯Br (11.5%) and C⋯H/H⋯C (10.6%) inter-actions.

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Ethyl 6-amino-5-cyano-4-isopropyl-2-methyl-4H-pyran-3-carboxyl-ate.

Project description:In the title compound, C(13)H(18)N(2)O(3), the two H atoms of the NH(2) group are engaged in hydrogen bonding with the N atom of the cyano group and with one O atom of the ethoxy-carbonyl group, building a chain parallel to the [100] direction. The N-H⋯N hydrogen bonds assemble the mol-ecules around inversion centres, forming dimers with an R(2) (2)(12) graph-set motif.

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Ethyl 6-amino-5-cyano-2,4-bis-(4-methyl-phen-yl)-4H-pyran-3-carboxyl-ate.

Project description:In the title compound, C(23)H(22)N(2)O(3), the pyran ring adopts a twisted boat conformation. The tolyl rings and carboxyl-ate group are attached to the pyran ring with torsion angles of -77.1?(2), 59.5?(3) and 17.8?(3)°, respectively. The ethyl group is disordered over two orientations with a site-occupancy ratio of 0.508?(5):0.492?(5). In the crystal, mol-ecules are linked by N-H?N and N-H?O hydrogen bonds, generating a chain running the a axis. Weak C-H?O, C-H?N and C-H?? inter-actions are also observed.

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Crystal structure and Hirshfeld surface analysis of ethyl 6'-amino-2'-(chloro-meth-yl)-5'-cyano-2-oxo-1,2-di-hydro-spiro-[indoline-3,4'-pyran]-3'-carboxyl-ate.

Project description:The mol-ecular conformation of the title compound, C17H14ClN3O4, is stabilized by an intra-molecular C-H⋯O contact, forming an S(6) ring motif. In the crystal, the mol-ecules are connected by N-H⋯O hydrogen-bond pairs along the b-axis direction as dimers with R 2 2(8) and R 2 2(14) ring motifs and as ribbons formed by inter-molecular C-H⋯N hydrogen bonds. There are weak van der Waals inter-actions between the ribbons. The most important contributions to the surface contacts are from H⋯H (34.9%), O⋯H/H⋯O (19.2%), C⋯H/H⋯C (11.9%), Cl⋯H/H⋯Cl (10.7%) and N⋯H/H⋯N (10.4%) inter-actions, as concluded from a Hirshfeld surface analysis.

| S-EPMC8382051 | biostudies-literature

Ethyl 6-amino-5-cyano-2-methyl-4-propyl-4H-pyran-3-carboxyl-ate.

Project description:The pyran ring of the title compound, C(13)H(18)N(2)O(3), is almost planar (r.m.s. deviation = 0.059?Å). The crystal packing is stabilized by N-H?O and N-H?N hydrogen bonds.

| S-EPMC2971089 | biostudies-other

Methyl 3-[ferrocen-yl(hydr-oxy)meth-yl]-1-methyl-2'-oxospiro-[pyrrolidine-2,3'-indoline]-3-carboxyl-ate.

Project description:In the title compound, [Fe(C(5)H(5))(C(20)H(21)N(2)O(4))], the pyrrolidine ring exhibits an envelope conformation with the spiro-C atom deviating from the plane of the remaining four atoms. The pyrrolidine ring is almost perpendicular to the indolinone ring [dihedral angle = 87.52?(7)°]. The structure is stabilized by an intra-molecular O-H?N hydrogen bond and by inter-molecular C-H?O and N-H?O inter-actions.

| S-EPMC2977586 | biostudies-literature

Crystal structure of isobutyl 4-(2-chloro-phen-yl)-5-cyano-6-{(E)-[(di-methyl-amino)-methyl-idene]amino}-2-methyl-4H-pyran-3-carboxyl-ate.

Project description:In the title compound, C21H24ClN3O3, the dihedral angle between the pyran ring (r.m.s. deviation = 0.037?Å) and the chloro-benzene ring is 88.56?(14)°. In the crystal, the mol-ecules are linked by C-H?O inter-actions, generating C(7) (001) chains.

| S-EPMC4384599 | biostudies-literature

Ethyl 3-amino-5-anilino-4-cyano-thio-phene-2-carboxyl-ate.

Project description:In the title compound, C14H13N3O2S, the dihedral angle between the thio-phene and phenyl rings is 24.95?(8)°. The mol-ecular structure is consolidated by intra-molecular N-H?O and C-H?S inter-actions. The crystal structure features N-H?N and N-H?O hydrogen bonds forming centrosymmetric R 2 (2)(12) dimers, which are linked into a two-dimensional network parallel to (011) with an S(6)R 2 (2) S(6) motif. In addition, ?-? stacking inter-actions [centroid-centroid distance = 3.7013?(12)?Å] occur between the thio-phene and phenyl rings of adjacent mol-ecules.

| S-EPMC3793747 | biostudies-literature

Methyl 4'-(4-fluoro-phen-yl)-1'-methyl-3'-nitro-methyl-2-oxospiro-[indoline-3,2'-pyrrolidine]-3'-carboxyl-ate.

Project description:In the title compound, C(21)H(20)FN(3)O(5), the the pyrrolidine ring makes dihedral angles of 84.91?(6) and 62.38?(7)° with the oxindole unit and the fluoro-phenyl ring, respectively. The pyrrolidine ring assumes an envelope conformation with the spiro C atom as the flap. The crystal packing features weak N-H?N and C-H?O hydrogen bonds.

| S-EPMC3569805 | biostudies-other

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