1,3-Dicyclo-hexyl-1-(4-nitro-benzo-yl)urea.

In the title compound, C(20)H(27)N(3)O(4), both cyclo-hexane rings adopt chair conformations. The benzene ring and the amide group are oriented at a dihedral angle of 62.1 (2)°. In the crystal structure, inter-molecular N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into chains propagating in [010], which contain R(2) (2)(12) ring motifs.

1-Ethyl-2-tosyl-4,4,6-trimethyl-2,3,3a,4-tetra-hydro-1H-pyrrolo[3,4-c]pyrano[6,5-b]quinoline-11(6H)-one monohydrate.

In the title compound, C(26)H(30)N(2)O(4)S·H(2)O, the pyrrolidine and dihydro-pyran rings adopt envelope conformations and they are cis-fused. The sulfonyl group has a distorted tetra-hedral geometry. In the crystal structure, the mol-ecules are linked into a ribbon-like structure along the a axis by O/C-H⋯O hydrogen bonds involving water mol-ecules and C-H⋯π inter-actions involving the sulfonyl-bound phenyl ring. Adjacent ribbons are cross-linked via C-H⋯O hydrogen bonds involving a sulfonyl O atom and C-H⋯π inter-actions involving the pyridinone ring.

1-Benzyl-6,8-dimethyl-4-phenyl-2-tosyl-1,2,3,3a,4,6,7,8,9,9b-deca-hydro-pyrrolo[3,4-c]pyrano[6,5-d]pyrimidine-7,9-dione.

The mol-ecule of the title compound, C(31)H(31)N(3)O(5)S, adopts a folded conformation, with the sulfonyl-bound phenyl ring lying over the pyrimidine ring [dihedral angle = 12.04 (6)° and centroid-centroid separation = 3.6986 (8) Å]. The pyrrolidine ring adopts a twist conformation, the dihydro-pyran ring is in a half-chair conformation and the two rings are cis-fused. The tosyl group is attached to the pyrrolidine ring in an equatorial position while the benzyl group is axially attached. The mol-ecular structure is stabilized by weak C-H⋯O hydrogen bonds and C-H⋯π inter-actions. In the crystal, pairs of mol-ecules related by inversion symmetry are linked by C-H⋯O hydrogen bonds, forming chains propagating along the c axis which are cross-linked into a three-dimensional framework by further C-H⋯O links.

3-Benzyl-9-phenyl-2-tosyl-2,3,3a,4,9,9a-hexa-hydro-1H-pyrrolo[3,4-b]quinoline.

In the title compound, C(31)H(30)N(2)O(2)S, the pyrrolidine ring adopts a twist conformation while the tetra-hydro-pyridine ring is in a half-chair conformation. The two rings are trans-fused. The pyridine-bound phenyl ring forms dihedral angles of 17.7 (1) and 48.1 (1)°, respectively, with the tosyl and benzyl phenyl rings. The mol-ecular structure is stabilized by an N-H⋯π inter-action involving the benzyl phenyl ring. In the crystal structure, mol-ecules translated by one unit along the a axis are linked into chains by C-H⋯π inter-actions involving the benzene ring of the tosyl group.

3-Benzyl-7-methyl-9-phenyl-2-tosyl-2,3,3a,4,9,9a-hexa-hydro-1H-pyrrolo[3,4-b]quinoline.

In the title compound, C(32)H(32)N(2)O(2)S, the pyrrolidine ring adopts a twist conformation while the tetra-hydro-pyridine ring is in a distorted half-chair conformation. The two rings are trans-fused. The dihedral angle between the sulfonyl and benzyl phenyl rings is 72.54 (14)°. The mol-ecular structure is stabilized by C-H⋯O hydrogen bonds, and N-H⋯π inter-actions involving the benzyl phenyl ring. The screw-related mol-ecules are linked into chains along the b axis by C-H⋯O hydrogen bonds and C-H⋯π inter-actions. Adjacent inversion-related chains inter-act via C-H⋯π inter-actions, forming a two-dimensional network parallel to the bc plane.

4,4-Dimethyl-2-tosyl-1,2,3,3a,4,11b-hexa-hydro-11H-pyrrolo[3,4-c]pyrano[5,6-c]chromen-11-one 0.125-hydrate.

In the title compound, C(23)H(23)NO(5)S·0.125H(2)O, the pyrrolidine ring has a twist conformation and the dihydro-pyran ring adopts a half-chair conformation; the two rings are cis-fused. The mol-ecule adopts a folded conformation. The sulfonyl-bound phenyl ring and the pyran ring of the coumarin ring system are stacked over one another, with a centroid-centroid distance of 3.7470 (7) Å; the dihedral angle between the two rings is 18.93 (2)°. An intra-molecular C-H⋯O hydrogen bond is observed. The solvent water mol-ecule, lying on a twofold rotation axis, is only partially occupied with an occupancy of 0.125 (relative occupancy with respect to the main molecule) and is involved in O-H⋯O and C-H⋯O hydrogen bonding.

3-Benzyl-7-meth-oxy-9-phenyl-2-tosyl-2,3,3a,4,9,9a-hexa-hydro-1H-pyrrolo[3,4-b]quinoline.

In the title compound, C(32)H(32)N(2)O(3)S, the pyrrolidine ring adopts an envelope conformation with the methine C atom nearest to the phenyl ring as the flap atom. The tetra-hydro-pyridine ring has a half-chair conformation. The two rings are trans-fused. The phenyl ring bound to the tetra-hydro-pyridine is oriented almost perpendicular [dihedral angle = 86.35 (10)°] to the fused benzene ring. The dihedral angle between the benzyl-phenyl ring and the sulfonyl-bound phenyl ring is 69.43 (10)°. A very weak N-H⋯π inter-action is observed in the mol-ecular structure. In the crystal, mol-ecules translated one unit along the b axis are linked into C(10) chains by C-H⋯O hydrogen bonds; adjacent chains are linked via C-H⋯π inter-actions, forming a two-dimensional network parallel to the bc plane.

3-Benzyl-7-chloro-9-phenyl-2-tosyl-2,3,3a,4,9,9a-hexa-hydro-1H-pyrrolo[3,4-b]quinoline.

In the title compound, C(31)H(29)ClN(2)O(2)S, the pyrrolidine ring adopts an envelope conformation with the methine C atom adjacent to the NH group as the flap atom. The tetra-hydro-pyridine ring has a half-chair conformation. The two rings are trans-fused. The chloro-benzene ring and the adjacent phenyl ring form a dihedral angle of 77.9 (1)°. The benzyl phenyl and the tosyl phenyl rings are oriented at a dihedral angle of 88.0 (1)°. In the crystal, mol-ecules are linked into chains along the a axis by N-H⋯Cl and C-H⋯Cl hydrogen bonds and the adjacent chains are cross-linked via C-H⋯π inter-actions.

3-Benzyl-7-bromo-9-phenyl-2-tosyl-2,3,3a,4,9,9a-hexa-hydro-1H-pyrrolo[3,4-b]quinoline.

In the title compound, C(31)H(29)BrN(2)O(2)S, the pyrrolidine ring is in a twist conformation and the tetra-hydro-pyridine ring adopts an envelope conformation with the methine C atom adjacent to the NH group as the flap atom; the two rings are trans-fused. The bromo-benzene ring and the nearest phenyl ring form a dihedral angle of 82.72 (10)°. The benzyl phenyl and the tosyl phenyl rings are oriented at a dihedral angle of 75.57 (11)°. An intra-molecular N-H⋯π inter-action is observed. In the crystal, mol-ecules are linked into chains running along [101] by C-H⋯O hydrogen bonds and the chains are cross-linked via weak C-H⋯π inter-actions.

cis-1-Ethyl-4,4,6,8-tetra-methyl-2-tosyl-2,3,3a,4,6,7,8,9-octa-hydro-1H-pyrrolo[3',4':3,4]pyrano[6,5-d]pyrimidine-7,9-dione.

In the title compound, C(22)H(29)N(3)O(5)S, the pyrrolidine ring is cis-fused to the dihydro-pyran ring. The pyrrolidine and dihydro-pyran rings adopt twist and half-chair conformations, respectively. The mol-ecule is in a folded conformation; the sulfonyl-bound benzene ring lies over the pyrimidine-dione ring, with a weak π-π inter-action [centroid-centroid distance = 3.6147 (4) Å]. A weak intra-molecular C-H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, molecules are linked into a three-dimensional network by C-H⋯O hydrogen bonds.

3-Ethyl-9-phenyl-2-tosyl-2,3,3a,4,9,9a-hexahydro-1H-pyrrolo[3,4-b]quinoline.

In the mol-ecule of the title compound, C(26)H(28)N(2)O(2)S, the pyrrolidine ring adopts an envelope conformation and the tetra-hydro-pyridine ring is in a half-chair conformation; these two rings are trans-fused. The dihedral angle between the pyridine- and sulfonyl-bound benzene rings is 36.15 (5)°. In the crystalline state, the mol-ecules are linked into a two-dimensional network parallel to the ab plane by C-H⋯O and C-H⋯π inter-actions.

Erratum: Seven papers on fused-ring heterocyclic ketones containing an N-tosyl-pyrrolo-[3,4-c]pyrano moiety. Corrigenda.

Corrections are made to the name of an author in seven papers by Chinnakali et al. [Acta Cryst. (2007), E63, o4363, o4364, o4434-o4435, o4436-o4437, o4438, o4489-o4490 and o4491-o4492].[This corrects the article DOI: 10.1107/S1600536807050799.][This corrects the article DOI: 10.1107/S1600536807050805.][This corrects the article DOI: 10.1107/S160053680705221X.][This corrects the article DOI: 10.1107/S1600536807052221.][This corrects the article DOI: 10.1107/S1600536807052233.][This corrects the article DOI: 10.1107/S1600536807053287.][This corrects the article DOI: 10.1107/S1600536807053263.].

7-Bromo-3-ethyl-9-phenyl-2-tosyl-pyrrolo[3,4-b]quinoline.

In the title compound, C(26)H(27)BrN(2)O(2)S, the pyrrolidine ring adopts a twist conformation, while the tetra-hydro-pyridine ring is in a half-chair conformation. The two rings are trans-fused. The dihedral angle between the phenyl ring and the sulfonyl-bound benzene ring is 22.83 (7)°. N-H⋯O hydrogen bonds link the mol-ecules into a chain along the b axis, and the chains are cross-linked into a three-dimensional network by a C-H⋯π inter-action and a weak π-π inter-action between the sulfonyl-bound benzene rings; the centroid-centroid distance is 3.6957 (8) Å.

N-[4-bromo-2-[(3-bromo-1-phenylsulfonyl-1H-indol-2-yl)methyl]-5-methoxyphenyl]acetamide.

In the title compound, C(24)H(20)Br(2)N(2)O(4)S, the indole ring system is planar and the S atom has a distorted tetrahedral configuration. The sulfonyl-bound phenyl ring is orthogonal to the indole ring system and the conformation of the phenylsulfonyl substituent with respect to the indole moiety is influenced by intramolecular C-H...O hydrogen bonds involving the two sulfonyl O atoms. The mean plane through the acetylamido group makes a dihedral angle of 57.0 (1) degrees with the phenyl ring of the benzyl moiety. In the crystal, glide-related molecules are linked together by N-H...O hydrogen bonds and C-H...pi interactions to form molecular chains, which extend through the crystal. Inversion-related chains are interlinked by C-H...pi interactions to form molecular layers parallel to the bc plane. These layers are interconnected through pi-pi interactions involving the five- and six-membered rings of the indole moiety.

A convenient route to synthesize the fully conjugated bimetallic complex (Bu4N)2[tto[Ni(dmit)2]] (tto = tetrathiooxalate, C2S4(2-), and dmit = 1,3-dithiole-2-thione-4,5-dithiolate, C3S5(2-) and the crystal structure of a new crystal form.

A novel route for the conversion of (Bu4N)2[Ni(dmit)2] to (Bu4N)2[tto[Ni(dmit)2]] is reported here. This provides a much more efficient way of synthesizing (Bu4N)2[tto[Ni(dmit)2]] than the literature method. During the process, the conversion of dmit2- to tto2- was realized for the first time. This new synthesis should facilitate further research on the conducting bimetallic complexes [C]x[tto[Ni(dmit)2]]. In addition, a new crystal form of (Bu4N)2[tto[Ni(dmit)2]]. In addition, a new crystal form of (Bu4N)2[tto[Ni(dmit)2]] was determined by X-ray crystallographic analysis.