THE TITLE COMPOUND [SYSTEMATIC NAME: (3bS,5aS,7R,8R,10aR,10bS)-7-meth-oxy-10b-methyl-3b,4,5,6,7,8,9,10,10a,10b,11,12-dodeca-hydro-5a,8-methano-5aH-cyclo-hepta-l[5,6]naph-tho[2,1-b]furan-7-methanol], C(21)H(30)O(3), was isolated from the beans of Coffea robusta. The mol-ecule contains five fused rings including a furan ring. The two six-membered rings are in chair conformations, but the third si...

The title compound, C(36)H(34)N(4)O(4)S(2), is a thio-glycoluril derivative, which bears two phenyl substituents on its convex face and two meth-oxy substituted o-xylylenes as sidewalls of the molecular clip. There is one half-mol-ecule in the asymmetric unit: a crystallographic twofold axis generates the complete molecule. The non-planar seven-membered rings adopt chair conformations, while th...

The title compound, C16H24Cl2O, was synthesized in three steps from β-himachalene (3,5,5,9-tetra-methyl-2,4a,5,6,7,8-hexa-hydro-1H-benzo-cyclo-heptene), which was isolated from essential oil of the Atlas cedar (cedrus atlantica). The asymmetric unit contains two independent mol-ecules with similar conformations. Each mol-ecule is built up from two fused seven-membered rings and an additional th...

The title compound, C(23)H(18)N(2)O(6), is the product of an intra-molecular thermal cyclo-addition within 1-malein-2-[(E)-2-(2-fur-yl)vin-yl]-4-oxo-3,4-dihydro-quinazoline. The mol-ecule comprises a previously unknown fused penta-cyclic system containing two five-membered rings (2-pyrrolidinone and furan) and three six-membered rings (benzene, 2,3-dihydro-4-pyrimidinone and dihydro-cyclo-hexa-...

The title compound, systematic name 9-isopropyl-idene-2,6-dimethyl-11-oxatricyclo-[6.2.1.0(1,5)]undec-6-en-8-ol, C(15)H(22)O(2), which crystallizes with two mol-ecules of similar conformation in the asymmetric unit, features three fused rings, two of which are five-membered and the third six-membered. Of the two five-membered rings, the one with an O atom has a distinct envelope shape (with the...

A novel buckybowl and its chiral hybrids featuring eight-membered rings helicene units have been synthesized characterized. The resulting hybrid complex with C 60 show promising ambipolar transport characteristics.

In the title compound, C(21)H(21)N(3)OS·C(3)H(7)NO, the carbonitrile mol-ecule is built up of two fused six-membered rings and one six-membered ring linked through a spiro C atom. The 1,3-diaza ring adopts an envelope conformation and the cyclo-hexane ring adopts a chair conformation. The dihedral angle between the aromatic rings is 46.7 (3)°. In the crystal, the components are linked by N-H⋯O ...

In the title mol-ecule, C(16)H(20)O(5)S(6), the two five-membered rings form a dihedral angle of 4.7 (3)°. The crystal packing exhibits weak inter-molecular C-H⋯O hydrogen bonds, which link the mol-ecules into chains propagating in [10], and π-π inter-actions, indicated by the short distances [3.756 (5) Å] between the centroids of five-membered rings from mol-ecules related by translation along...

The title compound, C(15)H(22)O(4), consists of two trans-fused six-membered rings and a trans-fused five-membered γ-lactone. The ep-oxy and hydroxyl groups are α-oriented. The cyclo-hexane rings adopt half-chair and chair conformations and the lactone ring is in an envelope conformation. The mol-ecular structure is stabilized by one O-H⋯O and three C-H⋯O intra-molecular hydrogen bonds.

A comprehensive survey of pathways leading to the generation of α-trifluoromethyl monocyclic piperidinic derivatives is provided (65 references). These compounds have been synthesized either from 6-membered rings e.g., pipecolic acid or lactam derivatives by introduction a trifluoromethyl group, from pyridine or pyridinone derivatives by reduction, and from 5-membered rings e.g., prolinol deriv...