In the title compound, C17H19NO3S2, the maximum deviation of atoms in the 2H-chromene ring system is 0.0097 (14) Å and the piperidine ring adopts a chair conformation. The dihedral angle between the 2H-chromene ring and the piperidine ring (all atoms) is 87.59 (8)°. In the crystal, inversion dimers linked by pairs of C-H⋯O inter-actions generate R 2 (2)(22) loops. Further C-H⋯O hydrogen bonds l...

In the title compound, C(16)H(18)N(2)O(2)S, the piperidine ring adopts a chair conformation. The central 4-thia-zolidinone ring makes dihedral angles of 12.01 (7) and 51.42 (9)°, respectively, with the benzene ring and the least-squares plane of the piperidine ring. An intra-molecular C-H⋯S hydrogen bond stabilizes the mol-ecular structure and generates an S(6) ring motif. In the crystal, mol-e...

In the title compound, C(9)H(12)Cl(2)N(4), the piperidine ring adopts a chair conformation. The electron delocalization of the molecule is indicated by the similar C⋯N distances within the triazine ring and by the double-bond character of the C=N triazine-piperidine connectivity. Weak intra-molecular C-H⋯N hydrogen bonds link the two rings within the mol-ecule, which exhibits a pseudo-mirror pl...

In the title compound, C(26)H(27)NO(3), the piperidine ring adopts a chair conformation. The two methoxy-phenyl groups attached to the piperidine ring at positions 2 and 6 have equatorial orientations and make a dihedral angle of 87.33 (8)°. The benzyl group at position 3 has an equatorial orientation. The phenyl ring of the benzyl group makes dihedral angles of 75.60 (9) and 73.69 (9)° with th...

In the title mefloquine-oxazolidine derivative, C(24)H(20)F(6)N(2)O(2), the oxazoline ring adopts an envelope conformation (the flap atom is N) and the piperidine ring has a chair conformation. The oxazoline and benzene residues lie away from the C(6) ring of the quinoline group and, to a first approximation, to one side of the plane through the ten atoms (r.m.s. deviation = 0.025 Å). An intra-...

In the title compound, C(26)H(27)ClN(2)O, the piperidine ring has a chair conformation and all of the ring substituents at Csp(3) atoms occupy equatorial positions. The dihedral angle formed between the phenyl rings is 48.11 (9)°. The chloro-benzene ring occupies a position orthogonal to the meth-oxy(methyl-idene)amine residue [N-O-C-C torsion angle = -87.90 (15)°]. The conformation about the i...

The surface tension of aqueous solutions of simple cyclic, heterocyclic and aromatic amines was measured with a Du Nöuy tensiometer at 25 degrees C and the results discussed in terms of structure-aggregation relationships. The simple compounds used in this study were piperazine, piperidine, morpholine, 3-methylpyridine, cyclohexylamine and benzylamine, with carbon numbers ranging from four to s...

The direct three component modified Mannich reaction via condensation of aldehydes, 2-naphthol or 2,7-naphthalendiol and piperidine to generate Betti bases has been carried out over L-proline (20 mol%) with high efficiency under solvent free conditions at 70 OC. Also, the reaction of aromatic aldehyde and 4-hydroxycoumarin in the presence of L-proline (20 mol%) in the ethanol under reflux condi...

The title compound, C(20)H(19)NO, is a substructure of CP-640186, a potent inhibitor of mammalian acetyl-coenzyme A carboxyl-ases. In the crystal structure, the amide group forms a dihedral angle of 87.0 (1)° with the plane of the anthracene unit and the piperidine ring adopts a chair conformation. Mol-ecules are arranged into layers parallel to (100) and adjacent anthracene units within layers...