organic compounds
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The title compound, C21H24N2O2, is a phenyl hydrazine derivative of the well known anthelminthic agent α-santonin, which is composed of three fused rings (benzodieneone, cyclohexane and γ-lactone). The cyclohexadienone ring adopts a boat conformation, the cyclohexane ring is in a chair conformation and the trans-fused γ-lactone ring adopts a C-envelope conformation. In the crystal, molecules are linked by N—HO and C—HO hydrogen bonds, forming chains along the a axis.
organic compounds
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The title compound, C21H23NO3, is a phenylimine derivative of the well known anthelmintic agent α-santonin. The trans-fused cyclohexane and γ-lactone rings of the α-santonin ring system adopt chair and envelope conformations, respectively, whereas the hexadiene ring is approximately planar [maximum deviation = 0.029 (4) Å] and forms a dihedral angle of 62.30 (11)° with the benzene ring. An intramolecular O—HN hydrogen bond is observed.
organic compounds
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In the title compound, C15H14O4S, the dihedral angle between the benzene and phenyl rings is 88.74 (10)°. In the crystal, molecules are linked into a three-dimensional network by C—HO hydrogen bonds and π–π stacking interactions [centroid–centroid distances = 3.6092 (13)–3.8651 (13) Å].
organic compounds
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In the structure of the title compound, C13H8ClNS, the dihedral angle between the benzothiazole ring system and the phenyl ring is 7.11 (8)°. In the crystal, molecules are arranged parallel to the c axis.
organic compounds
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In the molecule of the title compound, C14H10ClNO2S, the dihedral angle between the almost planar benzothiazole ring system [maximum deviation = 0.005 (2) Å] and the benzene ring is 1.23 (9)°. The conformation of the molecule is stabilized by an intramolecular O—HN hydrogen bond, forming an S(6) ring motif. In the crystal, molecules are linked into layers parallel to the ac plane by C—HO hydrogen bonds and π–π stacking interactions [centroid–centroid distance = 3.7365 (12) Å].
organic compounds
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In the title compound, C11H8O3, the benzopyran-4-one or chromone ring system is almost planar, with a maximum deviation of 0.045 (2) Å. The crystal structure is stablized by π–π interactions between the benzene and pyran rings of inversion-related molecules stacked along the b axis, with a centroid–centroid distance of 3.5463 (12) Å
organic compounds
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In the title compound, C15H14O4, the chromone ring system is close to being planar [maximum deviation = 0.015 (2) Å]. The double bond of the ethyl prop-2-enoate chain adopts an E conformation and an intramolecular C—HO hydrogen bond generates an S6 ring. In the crystal, inversion dimers linked by pairs of C—HO hydrogen bonds generate R22(14) loops. Weak π–π interactions [centroid–centroid distance = 3.8493 (12) Å] also occur.
organic compounds
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In the title compound, C16H14ClNO3S, the dihedral angle between the almost-planar benzothiazole ring system [maximum deviation = 0.012 (3) Å] and the aromatic ring of the trimethoxyphenyl group is 15.56 (6)°. In the crystal, the molecules are arranged into layers parallel to the bc plane, held together only by weak van der Waals forces.