In the title compound, C(16)H(17)FN(2)O(4)·H(2)O, the dihedral angle between the heterocyclic ring and the benzene ring is 5.77 (9)°, that between the heterocycle and the ethoxy-carbonyl plane is 15.5 (1)°, and that between the heterocyclic ring and the cyclopropane ring is 67.75 (13)°. In the crystal structure, mol-ecules are linked into a ribbon-like structure along the c axis by N-H⋯O and O-...

The asymmetric unit of the title N-heterocyclic carbene compound, C(17)H(22)N(4) (2+)·2PF(6) (-), consists of one N-heterocyclic carbene dication and two hexa-fluoro-phosphate anions. The two imidazole rings are twisted away from but to the same side of the central toluene ring, making dihedral angles of 76.69 (7) and 78.03 (7)° with the central ring. In the crystal, the components are linked b...

The title compound, (C(21)H(25)N(2))[ReO(4)], was formed as the unexpected product in an attempted synthesis of a rhenium(I)-N-heterocyclic carbene (NHC) complex. The compound has crystallographic mirror symmetry with both the cation and the tetrahedral anion located across a mirror plane. The cation and anion are linked by a C-H⋯O hydrogen bond.

In the title compound, C(14)H(11)F(2)N(3)S, the heterocyclic five-membered ring has an envelope conformation. Although the mol-ecule is chiral, the compound is a racemate (R/S). There is a weak inter-molecular C-H⋯π inter-action but no classical hydrogen bonds are observed in the crystal structure.

A new phenolic-type compound containing a nitrogenous, heterocyclic-fused ring from the fruit of the argan tree, Argania spinosa (Skeels L.), is described. This and another already known compound also isolated in the course of the work belong to an obscure and rare class of natural products, the amino phenolics.

Heterocyclic compounds are widely prevalent in animal kingdom as well as in plant kingdom and they play various roles in metabolic processes. A large number of heterocyclic compounds are in clinical practice as a drug, while many of them find industrial utility and hence the syntheses of heterocyclic compounds and understanding of the biological importance of specific heterocyclic class will be...

The title compound, C(21)H(27)NO(2), exhibits hydrogen bonding between the phenolic H atom and the heterocyclic N atom. The absolute configuration of the mol-ecule is known from the synthetic procedure.

In the title compound, C(22)H(21)N, the pyridine ring adopts a distorted boat conformation, while the adjacent pyran ring adopts a chair conformation; the heterocyclic rings make a dihedral angle of 40.1 (2)° with each other.

In the title compound, C(26)H(27)NO(4), the heterocyclic ring assumes a half-chair conformation and inter-molecular C-H⋯O inter-actions help to construct the three-dimensional network within the crystal packing.