In the title compound, C24H25N3O2S2, the piperidine ring adopts a distorted boat conformation. The phenyl rings subtend angles of 75.6 (1)° and 86.3 (1)° with the mean plane of the piperidine ring. In the crystal, mol-ecules are linked through a network C-H⋯N hydrogen bonds, forming zigzag chains along [100]. The thia-diazol ring methyl group is disordered over two positions with an occupancy r...

Aseries of piperidine derivatives was synthesis by the reaction between substituted benzaldhyde ,pentanone-3,and ammonium acetate by refluxining for 1-2 hr in ethanol and the derivatives refluxed with (4,4'-Diaminodiphenyl sulphone) yielded bispiperidine ,the structures of the synthesized compounds were confirmed by spectroscopy analysis , The reported compounds were screened for their antibact...

In the title compound, C17H22N2O4S, a thio-piperidine derivative, the piperidine ring has an envelope conformation with the methyl-ene C atom opposite to the C=S bond as the flap. The nitro-methyl substituent is equatorial while the eth-oxy-carbonyl group is axial. The mean planes of the nitro-methyl group, the carb-oxy group and phenyl ring are inclined to the mean plane through the five plana...

The title ester, C27H30N2O3, crystallizes with two independent mol-ecules in the asymmetric unit whose geometrical features are similar. In each mol-ecule, the pyrrolidine ring adopts an envelope conformation, with the fused C atom shared with the piperidine ring as the flap, and the piperidine ring adopts a chair conformation. In the crystal, C-H⋯π inter-actions link the inversion-related mole...

An efficient, scaleable synthesis approach towards the spirocyclic oxindole analogue 1'-(tert-butoxycarbonyl)-2-oxospiro[indoline-3,4'-piperidine]-5-carboxylic acid (1) is described. The key steps are dianion alkylation and cyclization of ethyl 2- oxindoline-5-carboxylate (4) and demethylation of the resulting spirocyclic oxindole ethyl 1'-methyl-2-oxospiro[indoline-3,4'-piperidine]-5-carboxyla...

The title mol-ecule, C(25)H(22)F(6)N(2)O(3), adopts an open conformation whereby the quinoline and carboxyl-ate ester groups are orientated in opposite directions but to the same side of the piperidine ring so that the mol-ecule has an approximate U-shape. The piperidine ring adopts a distorted boat conformation. In the crystal, inversion dimers linked by pairs of O-H⋯O hydrogen bonds generate ...

9-formyljulolidine was oxidized via a microwave-assisted Willgerodt-Kindler reaction to the N-piperidine or N-morpholine julolidine-9-thioamide. 9-formyl-1,1,7,7-tetramethyljulolidine gave the corresponding N-piperidine tetramethyljulolidine-9-thioamide. The thioamides were converted to the corresponding carboxamides with trifluoroacetic anhydride. The amide group directed ortho-metalation in t...

In the title compound, C(6)H(13)N(3), the C=N and C-N bond lengths in the CN(3) unit are 1.3090 (17), and 1.3640 (17) (C-NH(2)) and 1.3773 (16) Å, indicating double- and single-bond character, respectively. The N-C-N angles are 116.82 (12), 119.08 (11) and 124.09 (11)°, showing a deviation of the CN(3) plane from an ideal trigonal-planar geometry. The piperidine ring is in a chair conformation....