organic compounds
Open access
In the title E isomer of the racemic compound, C37H32F2N2O2, the pyridinone ring adopts a twisted half-chair conformation with the N atom deviating by −0.355 (3) Å and with the methylene C atom next to octahydroindolizine moiety deviating by 0.415 (3) Å from the mean plane defined by other four atoms. In the octahydroindolizine system, the pyrrolidine ring exhibits an envelope conformation with the fused methyne C atom deviating by 0.6496 (1) Å from the mean plane defined by four other atoms, and the piperidine ring exhibits a distorted chair conformation as evident from the puckering parameters Q = 0.568 (2) Å, θ = 1.0 (2) and Φ = 256 (11)°. In the crystal, C—HO interactions connect the molecules into chains along [101].
organic compounds
Open access
In the title compound, C39H38N2O4, the pyridinone ring adopts a twisted half-chair conformation with the N atom deviating by 0.3304 (1) and with the methylene C atom adjacent to the octahydroindolizine unit deviating by 0.444 (3) Å from the mean plane defined by the other four atoms. In the octahydroindolizine system, the pyrrolidine ring exhibits an envelope conformation, with the fused methyne C atom deviating by 0.6315 (1) Å from the mean plane defined by the other four atoms, and the piperidine ring exhibits a distorted chair conformation, as reflected in the puckering parameters Q = 0.568 (4) Å, θ = 1.5 (4) and φ = 161 (16)°. In the crystal pairs of weak C—HO interactions form centrosymmetric dimers, which are further connected by C—Hπ interactions. The crystal studied was a non-merohedral twin, with a domain ratio of 0.91:0.09.
organic compounds
Open access
In the title compound, C20H17N3O4, the central pyran ring adopts a boat conformation with the O atom and diagonally opposite C atoms displaced by 0.1171 (1) and 0.1791 (1) Å, respectively, from the mean plane defined by the other four atoms. The coplanar atoms of the pyran ring and the methoxybenzene ring are nearly perpendicular, as evidenced by the dihedral angle 87.01 (1)°. The amine H atom forms an intramolecular N—HO(nitro) hydrogen bond. In the crystal, molecules are linked into dimeric aggregates by N—HO(nitro) hydrogen bonds, generating an R22(12) graph-set motif.
organic compounds
Open access
In the title compound, C19H14FN3O3, the central pyran ring adopts a boat conformation with the O atom and the quaternary C atom diagonally opposite displaced by 0.068 (1) and 0.075 (1) Å, respectively, above the mean plane defined by the other four ring atoms. The co-planar atoms of the pyran ring and the fluorophenyl ring are nearly perpendicular, as evidenced by the dihedral angle of 87.11 (1)°. The amine group forms an intramolecular N—HO(nitro) hydrogen bond. In the crystal, molecules are linked into parallel chains along [100] by weak N—HN and C—HN(nitro) hydrogen bonds, generating C(8) and C(9) graph-set motifs, respectively.
organic compounds
Open access
The title compound, C35H28N4O6S, crystallizes with two molecules in the asymmetric unit. In both molecules, the piperidine ring adopts a shallow-chair conformation, the thiazole ring adopts a twisted conformation about the Cm—N bond (m = methine) and the pyrrole ring adopts an envelope conformation with the C atom shared with the thiazole ring as the flap. In the crystal, inversion dimers linked by pairs of C—HO interactions generate R22(34) loops for one of the asymmetric molecules. Further C—HO links also involving the other molecule lead to a three-dimesional network. The contribution of the highly disordered solvent to the scattering was removed with SQUEEZE option of PLATON [Spek (2009). Acta Cryst. D65, 148–155]. The solvent contribution is not included in the reported molecular weight and density.
organic compounds
Open access
In the title compound, C37H32F2N2O2, the central six-membered piperidine ring adopts a twisted half-chair conformation, with the N and methylene C atoms deviating by −0.2875 (16) and 0.4965 (15) Å, respectively, from the mean plane defined by the other four atoms. The piperidine connected to the octahydroindolizine ring is in a half-chair conformation. The five-membered pyrrole ring adopts a slightly twisted envelope conformation with the piperidine C atom as the flap atom. The F and H atoms of both fluorobenzene rings are disordered, with occupancy factors of 0.941 (3):0.059 (3) and 0.863 (3):0.137 (3). The molecular structure features some intramolecular C—HO interactions. In the crystal, a supramolecular zigzag chain sustained by C—HF interactions parallel to the c axis is formed, generating a C(12) graph-set motif.