1-Acetyl-t-3-ethyl-r-2,c-6-bis­(4-methoxy­phen­yl)piperidin-4-one

In the title compound, C23H27NO4, the piperidine ring adopts a distorted boat conformation. The meth­oxy groups lie in the plane of benzene rings to which they are attached [maximum deviations of 0.014 (3) and 0.007 (3) Å]. The benzene rings are oriented at angles of 67.2 (1) and 87.0 (1)° with respect to the best plane through the four co-planar atoms of the piperidine ring

r-2,c-6-Bis(4-chloro­phen­yl)-c-3,t-3-dimethyl­piperidin-4-one

In the title mol­ecule, C19H19Cl2NO, the piperidine ring adopts a chair conformation and the dihedral angle between the two benzene rings is 77.23 (7)°. In the crystal structure, mol­ecules are linked by N—H⋯O and C—H⋯O hydrogen bonds, and a weak C—H⋯π inter­action is also observed

Stereochemistry of 4-cyano-4-phenylamino-r-2, c-6-diphenylpiperidines

224-22

Stereochemistry of N-acetyl-r-2,c-4-diphenyl-3-azabicyclo[3.3.1]nonanes and N-ethoxycarbonyl-r-2,c-4-di phenyl-3-azabicyclo[3.3.1]nonane

730-73

1-Dichloro­acetyl-r-2,c-6-bis­(4-methoxy­phen­yl)-c-3,t-3-dimethyl­piperidin-4-one

In the title compound, C23H25Cl2NO4, the piperidine ring adopts a distorted boat conformation. Inversion-related mol­ecules are linked into centrosymmetric R 2 2(16) dimers by paired C—H⋯O hydrogen bonds, and the dimers are connected via C—H⋯O hydrogen bonds into a chain running along [101]

2-(1,2,3,4-Tetra­hydro-9H-carbazol-1-yl­idene)propane­dinitrile

In the title compound, C15H11N3, the cyclo­hexene ring adopts a sofa conformation. An intra­molecular N—H⋯N hydrogen bond generates an S(7) ring motif. In the crystal, mol­ecules are linked by inter­molecular N—H⋯N, C—H⋯N and C—H⋯π inter­actions into a three-dimensional network

1-Formyl-r-2,c-6-bis­(4-methoxy­phen­yl)-t-3-methyl­piperidin-4-one

The asymmetric unit of the title compound, C21H23NO4, contains two crystallographically independent mol­ecules A and B. In both mol­ecules, the piperidine-4-one rings adopt a distorted twist-boat conformation. The formyl group at position 1, the methoxy­phenyl ring at position 2 and the methyl group at position 3 are attached equatorially. The meth­oxy phenyl ring at position 6 has an axial orientation. The dihedral angle between the two benzene rings is 55.27 (8)° in mol­ecule A, and 55.29 (8)° in mol­ecule B. In the crystal, the mol­ecules are linked by weak C—H⋯O inter­molecular hydrogen-bond inter­actions. In addition, weak C—H⋯π inter­molecular inter­actions involving the benzene rings at positions 6 and 2 of mol­ecule B are also found in the crystal structure

Ethyl 2-[N-(2-formyl­phen­yl)benzene­sulfonamido]acetate

In the mol­ecule of the title compound, C17H17NO5S, the two aromatic rings are oriented at an angle of 30.13 (10)°. The ethyl acetate group assumes an extended conformation. Mol­ecules are linked into C(7) chains running along the a axis by inter­molecular C—H⋯O hydrogen bonds, and the chains are crosslinked via C—H⋯π inter­actions, with the sulfonyl-bound phenyl ring acting as an acceptor

3,3-Dimethyl-cis-2,6-di-p-tolyl­piperidin-4-one

In the title mol­ecule, C21H25NO, the piperidine ring adopts a chair conformation. The benzene rings and one of the methyl groups attached to the piperidine ring have equatorial orientations. The dihedral angle between the two benzene rings is 72.53 (9)°. In the crystal, mol­ecules are linked by N—H⋯O hydrogen bonds. Weak C—H⋯π inter­actions involving the benzene rings are also present in the crystal structure