282 research outputs found
N-Morpholino-Δ8-dihydroabietamide
The title compound, C24H39NO2 (systematic name: 4-{[1,4a-dimethyl-7-(propan-2-yl)-1,2,3,4,4a,5,6,7,8,9,10,10a-dodecahydrophenanthren-1-yl]carbonyl}morpholine), has been synthesized from Δ8-dihydroabietic acid. Two cyclohexene rings adopt half-chair conformations, whereas the cyclohexane and morpholine rings are each in the chair conformation. Two methyl groups are in an axial position with respect to the tricyclic hydrophenanthrene nuclei
N-Benzylidenenordehydroabietylamine
The title compound [systematic name: (1R,4aS,10aR,E)-N-benzylidene-7-isopropyl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octahydrophenanthren-1-amine], C26H33N, has been synthesized from nor-dehydroabietylamine and benzaldehyde. The two cyclohexane rings form a trans ring junction with classic chair and half-chair conformations, respectively, the two methyl groups are on the same side of tricyclic hydrophenanthrene structure. The dihedral angle between two benzene rings is 44.2 (4)°. The C=N bond is in an E configuration
Dehydroabietic acid
The title compound [systematic name: (1R,4aS,10aR)-7-isopropyl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octahydrophenanthrene-1-carboxylic acid], C20H28O2, has been isolated from disproportionated rosin which is obtained by isomerizing gum rosin with a Pd-C catalyst.. Two crystallographically independent molecules exist in the asymmetric unit. In each molecule, there are three six-membered rings, which adopt planar, half-chair and chair conformations. The two cyclohexane rings form a trans ring junction with the two methyl groups in axial positions. The crystal structure is stabilized by intermolecular O—H⋯O hydrogen bonds
2-Hydroxy-6,6-dimethylbicyclo[3.1.1]heptane-2-carboxylic acid
The title compound, C10H16O3, with a bicyclo[3.1.1]heptane unit, was obtained by oxidation of β-pinene. The asymmetric unit contains two independent molecules with similar geometry: the six-membered rings in both molecules adopt envelope conformations. In the crystal, the independent molecules exist as O—H⋯O hydrogen-bonded dimers. The dimers are linked into helical chains along the b axis by O—H⋯O hydrogen bonds
15-Hydroxyethyl-19-isopropyl-5,9-dimethyl-14,16-dioxo-15-azapentacyclo[10.5.2.01,10.04,9.013,17]nonadec-18-ene-5-carboxylic acid
The title compound, C26H37NO5, which was synthesized from monoethanolamine and maleopimaric acid, consists of two fused and unbridged cyclohexane rings. They form a trans ring junction with a chair conformation. The two methyl groups are in axial positions. In the crystal, intermolecular O—H⋯O hydrogen bonds link adjacent molecules into a layer structure. Two C—H⋯O interactions are also present
7-Isopropyl-1,4a-dimethyl-1,2,3,4,4a,5,6,7,8,9,10,10a-dodecahydrophenanthrene-1-carboxylic acid
The title compound, C20H32O2, has been isolated from hydrogenated rosin. There are two independent molecules in the asymmetric unit. In each molecule, the cyclohexane ring assumes a chair conformation, while the two cyclohexene rings adopt half-chair and envelope conformations. Intermolecular O—H⋯O hydrogen bonding between carboxyl groups links pairs of independent molecules into dimers
N-(2-Pyridylmethyleneamino)dehydroabietylamine
The title compound {systematic name: 1-[(1R,4aS,10aR)-7-isopropyl-1,2,3,4,4a,9,10,10a-octahydrophenanthren-1-yl]-N-[(E)-2-pyridylmethyleneamino]methanamine}, C26H33N2, has been synthesized from dehydroabietylamine. The two cyclohexane rings form a trans ring junction with classic chair and half-chair conformations, respectively, whereas the benzene and pyridine rings are almost planar, and the dihedral angle between them is 80.4°. The two methyl groups directly attached to the tricyclic nucleus are on the same side of the tricyclic hydrophenanthrene structure
16-Isopropyl-5,9-dimethyltetracyclo[10.2.2.01,10.04,9]hexadec-15-ene-5,14-dimethanol
The title compound, C23H38O2, a tetracyclo[10.2.2.01,10.04,9] hexadecane structure, crystallized with four independent molecules in the asymmetric unit. In the crystal, these independent molecules are linked by O—H⋯O hydrogen bonds, forming a polymeric chain propagating in [100
4-Isopropyl-N-phenylcyclohexa-1,3-diene-1-carboxamide
In the crystal structure of the title compound, C16H19NO, molecules are linked through a pair of N—H⋯O hydrogen bonds, forming chains along the a axis
- …