(1R,3S,8R)-3,7,7,10-Tetra­methyl­tri­cyclo­[6.4.0.0^1,3]dodec-9-en-11-one

The absolute configuration of the title compound, C₁₆H₂₄O, has been deduced from the chemical pathway. The six-membered ring has a roughly half-chair conformation with the quaternary C atom as the flap. The seven-membered ring displays a chair conformation. In the crystal, there is a weak C—H...O hydrogen bond between the methyl­ene group of the cyclo­propane ring and the carbonyl group of a screw-axis-related mol­ecule, which builds up a zigzag-like chain along the b-axis direction.

A one-dimensional polymeric cobalt(III)–potassium complex with 18-crown-6, cyanide and porphyrinate ligands

The reaction of Co^II(TpivPP) {TpivPP is the dianion of 5,10,15,20-tetra­kis­[2-(2,2-di­methyl­propanamido)­phen­yl]por­ph­yrin} with an excess of KCN salts and an excess of the 18-crown-6 in chloro­benzene leads to the polymeric title compound catena-poly[[dicyanido-2κ²C-(1,4,7,10,13,16-hexa­oxa­cyclo­octa­decane-1κ⁶O){μ₃-(2α,2β)-5,10,15,20-tetra­kis­[2-(2,2-di­methyl­propanamido)­phen­yl]porphyrinato-1κO⁵:2κ⁴N,N′,N′′,N′′′:1′κO¹⁵}cobalt(III)potassium] dihydrate], {[CoK(CN)₂(C₁₂H₂₄O₆)(C₆₄H₆₄N₈O₄]·2H₂O}_n. The Co^III ion lies on an inversion center, and the asymmetric unit contains one half of a [Co^III(2α,2β-TpivPP)(CN)₂]⁻ ion complex and one half of a [K(18-C-6]⁺ counter-ion (18-C-6 is 1,4,7,10,13,16-hexa­oxa­cyclo­octa­deca­ne), where the K^I ion lies on an inversion center. The Co^III ion is hexa­coordinated by two C-bonded axial cyanide ligands and the four pyrrole N atoms of the porphyrin ligand. The K^I ion is chelated by the six O atoms of the 18-crown-6 mol­ecule and is further coordinated by two O atoms of pivalamido groups of the porphyrin ligands, leading to the formation of polymeric chains running along [011]. In the crystal, the polymeric chains and the lattice water mol­ecules are linked by N—H...O and O—H...N hydrogen bonds, as well as weak C—H...O, O—H...π and C—H...π inter­actions into a three-dimensional supra­molecular architecture.

(4bS,8aS)-1-Isopropyl-4b,8,8-trimethyl-4b,5,6,7,8,8a,9,10-octa­hydro­phenan­thren-2-yl acetate

The hemisynthesis of the title compound, C₂₂H₃₂O₂, was carried out through direct acetyl­ation reaction of the naturally occurring diterpene totarol [systematic name: (4bS,8aS)-4b,8,8-trimethyl-1-propan-2-yl-5,6,7,8a,9,10-hexa­hydro­phen­an­thren-2-ol]. The mol­ecule is built up from three fused six membered rings, one saturated and two unsaturated. The central unsaturated ring has a half-chair conformation, whereas the other unsaturated ring displays a chair conformation. The absolute configuration is deduced from the chemical pathway. The value of the Hooft parameter [-0.10 (6)] allowed this absolute configuration to be confirmed.

(1S,3S,8R,9S,10R)-9,10-Ep­oxy-3,7,7,10-tetra­methyl­tri­cyclo­[6.4.0.0^1,3]dodeca­ne

The title compound, C₁₆H₂₆O, was synthesized by treating (1S,3S,8R)-3,7,7,10-tetra­methyl­tri­cyclo­[6.4.0.0^1,3]dodec-9-ene with meta­chloro­perbenzoic acid. The mol­ecule is built up from two fused six- and seven-membered rings. The six-membered ring has a half-chair conformation, whereas the seven-membered ring displays a boat conformation. In the crystal, there are no significant intermolecular interactions present.

(1R,4R,6S,7R)-5,5-Di­bromo-1,4,8,8-tetra­methyl­tri­cyclo­[5.4.1.0^4,6]dodecan-12-one

The title compound, C₁₆H₂₄Br₂O, was synthesized from the reaction of β-himachalene (3,5,5,9-tetra­methyl-2,4a,5,6,7,8-hexa­hydro-1H-benzo­cyclo­heptene), which was isolated from Atlas cedar (Cedrus atlantica). The asymmetric unit contains two independent mol­ecules with similar conformations. Each mol­ecule is built up from two fused seven-membered rings and an additional three-membered ring. In both mol­ecules, one of the seven-membered rings has a chair conformation, whereas the other displays a screw-boat conformation.

(4bS,8aS)-1-Isopropyl-4b,8,8-trimethyl-4b,5,6,7,8,8a,9,10-octa­hydro­phenan­thren-2-yl benzoate

The title compound, C₂₇H₃₄O₂, was hemisynthesized through direct benzoyl­ation of the naturally occurring meroterpene totarol. The central fused six-membered ring has a half-chair conformation, whereas the terminal six-membered ring displays a chair conformation. The dihedral angle between the fused benzene ring and the benzoyl benzene ring is 73.05 (14)°. The S,S chirality of the mol­ecule is consistent with the synthetic pathway, and confirmed by the refinement of the Flack parameter.