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

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

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

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

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

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

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