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Methyl 11-hy-droxy-9-[1-(4-meth-oxy-phen-yl)-4-oxo-3-phen-oxy-azetidin-2-yl]-18-oxo-10-oxa-2-aza-penta-cyclo-[9.7.0.0(1,8).0(2,6).0(12,17)]octa-deca-12(17),13,15-triene-8-carboxyl-ate.

ABSTRACT: In the title compound, C(34)H(32)N(2)O(8), one of the pyrrolidine rings in the pyrrolizidine ring system adopts a twist conformation, whereas the other ring adopts an envelope conformation (C atom as flap). The five-membered ring in the indene ring system and the fused furan ring also adopt envelope conformations (C and O atoms as flaps, respectively). The β-lactam ring makes dihedral angles of 23.41 (2) and 25.98 (2)°, respectively, with the attached meth-oxy-phenyl and phen-oxy rings. The mol-ecular conformation is stabilized by an intra-molecular O-H⋯N hydrogen bond, generating an S(5) motif. In the crystal, mol-ecules are linked into C(12) chains running along the a axis by C-H⋯O hydrogen bonds. The structure is further consolidated by weak inter-molecular C-H⋯π and π-π inter-actions [centroid-centroid distance = 3.7987 (14) Å].

SUBMITTER: Sundaramoorthy S

PROVIDER: S-EPMC3393998 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Methyl 11-hy-droxy-9-[1-(4-meth-oxy-phen-yl)-4-oxo-3-phenyl-azetidin-2-yl]-18-oxo-10-oxa-2-aza-penta-cyclo-[9.7.0.0(1,8).0(2,6).0(12,17)]octa-deca-12(17),13,15-triene-8-carboxyl-ate.

Project description:In the title compound, C34H32N2O7, the furan ring adopts a twist conformation and both the pyrrolidine rings adopt envelope conformations with O and C as flap atoms. The ?-lactam ring makes a dihedral angles of 80.20?(10)° with the furan ring, of 75.55?(10)° with the pyrrolidine ring, of 12.26?(10)° with the meth-oxy-phenyl ring and of 73.77?(13)° with the phenyl ring. The O atom attached to the ?-lactam ring deviates by 0.0385?(13)?Å from the ring plane. The mol-ecular conformation is stabilized by intra-molecular O-H?N and C-H?O hydrogen bonds. The packing of the crystal is stabilized by inter-molecular C-H?O hydrogen bonds, which form a chain running along the b axis.

| S-EPMC3588541 | biostudies-literature

11-Hy-droxy-9-[1-(4-methyl-phen-yl)-4-oxo-3-phenyl-azetidin-2-yl]-18-oxo-10-oxa-2-aza-penta-cyclo-[9.7.0.0(1,8).0(2,6).0(12,17)]octa-deca-12,14,16-triene-8-carbonitrile.

Project description:In the title compound, C33H29N3O5, the four-membered ring of the ?-lactam fragment is essentially planar (r.m.s. deviation = 0.0122?Å), with the carbonyl O atom displaced from this ring by 0.856?(9)?Å. The mean planes of the meth-oxy-phenyl and phenyl rings are inclined at dihedral angles 85.10?(7) and 21.56?(14)°, respectively, with respect to the mean plane of the four-membered ring. The pyrrolidine rings adopt envelope conformations with C atoms lying 0.535?(4) and 0.519?(4)?Å out of the planes formed by the remaining ring atoms. The furan ring also adopts an envelope conformation with a C atom 0.560?(3)?Å out of the plane formed by the remaining ring atoms. The nine-membered indene ring is almost planar (r.m.s. deviation = 0.0240?Å), with the carbonyl O atom displaced by 0.145?(3)?Å from this ring. The mol-ecular structure is stabilized by a strong intra-molecular O-H?N hydrogen bond and the crystal structure is consolidated by C-H?O hydrogen bonds.

| S-EPMC3588836 | biostudies-other

11-[1-(4-Meth-oxy-phen-yl)-4-oxo-3-phen-oxy-azetidin-2-yl]-14-methyl-12-oxa-8,14-diaza-tetra-cyclo-[8.3.3.0(1,10).0(2,7)]hexa-deca-2(7),3,5-triene-9,13-dione.

Project description:In the title compound, C(30)H(27)N(3)O(6), the furan and pyrrolidine rings adopt envelope conformations (with C and N atoms as the flaps, respectively). The piperidine ring is in a distorted boat conformation. The β-lactam ring is planar [maximum deviation = 0.0044 (16) Å] and forms dihedral angles of 30.61 (9) and 85.51 (9)°, respectively, with the attached meth-oxy-phenyl and phen-oxy rings. The crystal packing is stabilized by N-H⋯O and C-H⋯O inter-actions forming R(2) (2)(8), R(2) (2)(20) and R(2) (2)(14) ring motifs. The crystal structure is further consolidated by weak C-H⋯π inter-actions.

| S-EPMC3393999 | biostudies-literature

(3R,4S)-1-(4-Meth-oxy-phen-yl)-2-oxo-4-(3-vinyl-phen-yl)azetidin-3-yl acetate.

Project description:In the title compound, C20H19NO4, the absolute configuration (3R,4S) for the two chiral centres of the mol-ecule has been determined.

| S-EPMC3629641 | biostudies-literature

9-(3,4-Dimeth-oxy-phen-yl)-3,3,6,6-tetra-methyl-1,2,3,4,5,6,7,8,9,10-deca-hydro-acridine-1,8-dione.

Project description:The asymmetric unit of the title compound, C(25)H(31)NO(4), contains two independent mol-ecules. In one mol-ecule, the benzene ring and an attached meth-oxy group were refined as disordered over two sets of sites in a 0.65 (4): 0.35 (4) ratio. In both mol-ecules, the central ring of the acridinedione system adopts a flattened boat conformation. The four essentially planar atoms of this ring [maximum deviations = 0.006 (5) Å in both mol-ecules] forms dihedral angles of 86.8 (2) and 87.6 (2)°, respectively, with the major and minor components in the disordered benzene ring and 87.3 (2)° with the benzene ring in the fully ordered mol-ecule. The two outer rings of the acridinedione system adopt sofa conformations in both mol-ecules. In the crystal, N-H⋯O hydrogen bonds form two independent chains along [100]. C-H⋯O hydrogen bonds link the chains, forming a three-dimensional network.

| S-EPMC3569818 | biostudies-literature

2-{Hy-droxy[1-(4-meth-oxy-phen-yl)-4-oxo-3-phenyl-azetidin-2-yl]meth-yl}acrylonitrile.

Project description:In the title compound, C(20)H(18)N(2)O(3), the β-lactam ring is essentially planar, having a maximum deviation of 0.0291 (15) Å for the N atom, and perpendicular to the phenyl ring [dihedral angle = 85.55 (11)°]. The carbonitrile side chain is almost linear, the C-C-N angle being 176.8 (2)°. The crystal packing is stabilized by inter-molecular O-H⋯O and C-H⋯O inter-actions.

| S-EPMC3200613 | biostudies-literature

Methyl 12-hydroxy-10-[1-(4-meth-oxy-phen-yl)-2-oxo-3-phen-oxy-azetidin-4-yl]-11-oxa-3-aza-hexa-cyclo-[11.7.1.0(2,9).0(2,12).0(3,7).0(17,21)]henicosa-1(20),13,15,17(21),18-penta-ene-9-carboxyl-ate.

Project description:In the title compound, C37H34N2O7, both pyrrolidine rings adopt envelope conformations. The β-lactam ring is close to planar (r.m.s. deviation = 0.0395 Å) and makes a dihedral angle of 83.35 (15)° with the furan ring. The O atom attached to the β-lactam ring deviates by 0.187 (2) Å from the mean plane of the ring. The β-lactam ring makes dihedral angles of 14.90 (15) and 27.72 (17)° with the meth-oxy-phenyl and phenyl rings, respectively. The crystal packing features C-H⋯O hydrogen bonds.

| S-EPMC3588933 | biostudies-literature

1-(4-Meth-oxy-phen-yl)-4-(4-methyl-phen-yl)-3-phen-oxy-azetidin-2-one.

Project description:The central β-lactam ring of the title compound, C(23)H(21)NO(3), is almost planar (r.m.s. deviation = 0.032Å). The meth-oxy-benzene ring is almost coplanar with the β-lactam ring [dihedral angle = 1.87 (11)°], whereas the tolyl ring is almost normal to it [75.73 (12)°]. The dihedral angle between the β-lactam ring and the O-bonded phenyl ring is 51.95 (12)°. An intra-molecular C-H⋯O inter-action generates an S(6) ring. The crystal structure features inter-molecular C-H⋯O hydrogen bonds, forming layers parallel to (011), and weak C-H⋯π inter-actions. Two aromatic π-π stacking inter-actions [centroid-centroid distances = 3.6744 (12) and 3.6799 (11) Å] are also observed.

| S-EPMC3051730 | biostudies-literature

1-(4-Meth-oxy-phen-yl)-4-(3-nitro-phen-yl)-3-phen-oxy-azetidin-2-one.

Project description:In the title compound, C(22)H(18)N(2)O(5), the four-membered β-lactam ring is nearly planar, with a maximum deviation of 0.023 (2) Å for the N atom, and has long C-C distances of 1.525 (5) and 1.571 (5) Å. The mean plane of this group makes dihedral angles of 11.61 (19), 74.5 (2) and 72.3 (2)° with three aromatic rings. An intra-molecular C-H⋯O hydrogen bond occurs. The packing of the mol-ecules in the crystal structure is governed mainly by inter-molecular C-H⋯O hydrogen-bonding and C-H⋯π stacking inter-actions. Furthermore, a π-π inter-action [centroid-centroid distance = 3.6129 (19) Å] helps to stabilize the crystal structure.

| S-EPMC3051763 | biostudies-literature

3-(2,4-Dichloro-phen-oxy)-1-(4-meth-oxy-phen-yl)-4-(3-nitro-phen-yl)azetidin-2-one.

Project description:In the title compound, C(22)H(16)Cl(2)N(2)O(5), the nearly planar four-membered ?-lactam ring [maximum deviations of 0.011?(2) for the N atom] makes dihedral angles of 68.34?(13), 83.04?(13) and 3.37?(13)° with the dichloro-, nitro- and meth-oxy-phenyl rings, respectively. The crystal structure is stabilized by C-H?O hydrogen-bond inter-actions. In addition, a ?-? stacking inter-action [centroid-centroid distance = 3.6622?(12)?Å] is observed between the ?-lactam and nitro-phenyl rings.

| S-EPMC3050394 | biostudies-literature

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