4-(4,5,6,7-Tetra­chloro-1,3-dioxoisoindolin-2-yl)­benz­aldehyde

The title compound, C₁₅H₅Cl₄NO₃, was synthesized from tetra­chloro­phthalic anhydride and 4-amino­benz­aldehyde. In the mol­ecule, the tetra­chloro­phthal­imide unit is nearly planar and makes a dihedral angle of 56.20 (3)° with the benzene ring.

10′′-(4-Chlorobenzyl­idene)-5′′-(4-chlorophen­yl)-4′-(2,4-dichlorophenyl)-1′-methyl-2,3,2′′,3′′,7′′,8′′,9′′,10′′-octa­hydro-1H,5′′H,6′′H-indole-3-spiro-2′-pyrrolidine-3′-spiro-2′′-cyclo­hepteno[1,2-d]thia­zolo[3,2-a]pyrimidine-2,3′′-dione

The title compound, C₄₁H₃₂Cl₄N₄O₂S, was synthesized by the inter­molecular [3 + 2] cyclo­addition of azomethine ylide, derived from isatin and sarcosine by a deca­rboxylative route, and 5-(4-chloro)phen­yl-10-(4-chloro)benzyl­idene-2-(2,4-dichloro)­benzyl­idene-2,3,6,7,8,9-hexa­hydro-5H,10H-cyclohepteno[1,2-d]thia­zolo[3,2-a]pyrimidin-3-one. In the mol­ecule, the two spiro junctions link a planar 2-oxindole ring, a pyrrolidine ring in an envelope conformation and a 10-(aryl­methyl­ene)hexa­hydro­cyclo­hepteno[1,2-d]thia­zolo­[3,2-a]­pyrimidin-3-one ring. The packing of the mol­ecules in the crystal structure is mainly due to N—H...O hydrogen bonds.

(E)-4-[(4-Hydro­xy­phenyl)­diazenyl]­benz­aldehyde

The title compound, C₁₃H₁₀N₂O₂, is approximately planar in the solid state and displays a trans configuration with respect to the azo double bond. Molecules form infinite chains linked by O—H...O hydrogen bonds along the a axis.

7′′-Benz­yl-9′′-benzyl­idene-4′-[4-(dimethyl­amino)phen­yl]-1′-meth­yl-5′′-phen­yl- 2′′,3′′,6′′,7′′,8′′,9′′-hexa­hydro-1H-indole-3(2H)-spiro-2′-pyrrolidine-3′-spiro-2′′-pyrido[4,3-d]thia­zolo[3,2-a]pyrimidine-2,2′′-dione acetonitrile disolvate

The title compound, C₄₈H₄₄N₆O₂S·2C₂H₃N, was synthesized by the inter­molecular [3+2]-cyclo­addition of an azomethine ylide, derived from isatin and sarcosine by a deca­rboxylative route, and 7-benz­yl-9-benzyl­idene-2-[4-(dimethylamino)­benzyl­idene]-5-phen­yl-2,3,6,7,8,9-hexa­hydro-5H-pyrido[4,3-d]thia­zolo[3,2-a]pyrimidin-3-one. In the mol­ecule, the two spiro junctions link a planar 2-oxindole system, a pyrrolidine ring in an envelope conformation and a thia­zol­idone ring of the fused pyrimidine ring system. The packing of the mol­ecules in the crystal structure is mainly stabilized by N—H...O hydrogen bonds.

1,4-Bis[chloro­(hydroxy­imino)meth­yl]benzene N,N′-dimethyl­formamide disolvate

The structure of the centrosymmetric title compound, C₈H₆Cl₂N₂O₂·2C₃H₇NO, shows that the hydro­ximo­yl chloride substituent has an essentially planar arrangement and the dihedral angle between this plane and the benzene plane is 18.3 (4)°. The hydro­ximo­yl chloride group has a cis configuration. The packing can be described as a polymeric arrangement of mol­ecules linked through O—H...O hydrogen bonds.

10′′-(4-Methoxy­benzyl­idene)-5′′,4′-bis(4-methoxy­phen­yl)-1′-meth­yl-2,3,2′′,3′′,7′′,8′′,9′′,10′′-octa­hydro-1H,5′′H,6′′H-indole-3-spiro-2′-pyrrolidine-3′-spiro-2′′-cyclo­hepteno[1,2-d]thia­zolo[3,2-a]pyrimidine-2,3′′-dione

The title compound, C₄₄H₄₂N₄O₅S, was synthesized by the inter­molecular [3+2] cyclo­addition of an azomethine ylide, derived from isatin and sarcosine by a deca­rboxylative route, and 5-(4-methoxyphen­yl-10-(4-methoxy)benzyl­idene-2-(4-methoxy)benzyl­idene-2,3,6,7,8,9-hexa­hydro-5H,10H-cyclohepta­[1,2-d]thia­zolo[3,2-a]pyrimidin-3-one. In the mol­ecule, the two spiro junctions link a planar 2-oxindole ring, a pyrrolidine ring in an envelope conformation and a 10-(aryl­methyl­ene)hexa­hydro­cyclo­hepta­[1,2-d]thia­zolo[3,2-a]pyrimidin-3-one ring. The packing of the mol­ecules in the crystal structure is mainly governed by N—H...N hydrogen bonds.

4-[(Phenyl­diazen­yl)amino]benzaldehyde

The title compound, C₁₃H₁₁N₃O, is essentially planar in the solid state and displays a trans configuration with respect to the azo double bond. The dihedral angle between the planes of the two aromatic rings is 4.9 (4)°. Mol­ecules form infinite chains via N—H...O and C—H...O hydrogen bonds.

3-Eth­yl 5-meth­yl 4-(2-chloro­phen­yl)-6-meth­yl-2-[(2-phthalimidoeth­oxy)meth­yl]-1,4-dihydro­pyridine-3,5-dicarboxyl­ate dieth­yl ether hemisolvate

The title compound, C₂₈H₂₇ClN₂O₇·0.5C₄H₁₀O, was synthesized from eth­yl 3-amino-4-[2-(phthalimido)eth­oxy]crotonate and meth­yl 2-(2-chloro­benzyl­idene)acetoacetate by the Hantzsch reaction. The dihydro­pyridine ring is not planar, but adopts a boat conformation. The dihedral angle between the phthalimide and 2-chloro­phen­yl ring planes is 66.0 (3)°.

1-[(4-Formyl­phen­yl)hydrazono]naphthalen-2(1H)-one–2-naphthol (1/1)

The crystal structure of the title compound, C₁₇H₁₂N₂O₂·C₁₀H₈O, shows that the mol­ecules are effectively planar in the solid state and the compound exists in the hydrazone form and not the azo form. The hydrazone H atom and carbonyl O atom are linked by an intra­molecular N—H...O hydrogen bond. The 2-naphthol molecules are disordered over inversion centres, the asymmetric unit containing half each of two such molecules. The packing can be described as a polymeric arrangement of mol­ecules linked through O—H...O hydrogen bonds.