1′-Methyl-4′-(4-methyl­phen­yl)dispiro­[1-benzopyran-3(4H),3′-pyrrolidine-2′,3′′-indoline]-2,2′′-dione

In the title compound, C₂₇H₂₄N₂O₃, the pyrroldine ring adopts a twist conformation, while the six-membered pyran­one ring of the coumarin ring system is in a sofa conformation. In the crystal, pairs of N—H...O hydrogen bonds link the mol­ecules into inversion R₂²(8) dimers. These dimers are further connected via C—H...O hydrogen bonds.

2-(2H-1,3-Benzodioxol-5-yl)-1,3-benzo­thia­zole

In the title compound, C₁₄H₉O₂S, the benzothia­zole unit is oriented at a dihedral angle of 7.1 (1)° with respect to the benzodioxole unit. The dioxole ring adopts flattened envelope conformation with the methyl­ene C atom at the flap. The crystal packing is stabilized by π–π inter­actions [centroid–centroid distances = 3.705 (1) and 3.752 (1) Å], C—H...π inter­actions and a short S...S contact of 3.485 (1) Å.

(E)-Methyl 3-(3,4-dimeth­oxy­phen­yl)-2-[(1,3-dioxoisoindolin-2-yl)meth­yl]acrylate

In the title compound, C₂₁H₁₉NO₆, the isoindole ring system is essentially planar [maximum deviation = 0.019 (2) Å for the N atom] and is oriented at a dihedral angle of 51.3 (1)° with respect to the benzene ring. The two meth­oxy groups are almost coplanar with the attached benzene ring [C—O—C—C = 3.7 (4) and 4.3 (4)°]. The mol­ecular conformation is stabilized by an intra­molecular C—H...O hydrogen bond, which generates an S(9) ring motif. In the crystal, mol­ecules are linked through bifurcated C—H...(O,O) hydrogen bonds having R₁²(5) ring motifs, forming chains along the b-axis direction. The crystal packing is further stabilzed by π–π inter­actions [centriod–centroid distance = 3.463 (1) Å].

Methyl (2E)-2-({2-[(2E)-2-benzyl­idene-3-meth­oxy-3-oxoprop­yl]-1,3-dioxoindan-2-yl}meth­yl)-3-phenyl­prop-2-enoate

In the title compound, C₃₁H₂₆O₆, the five-membered ring of the indane unit adopts a slight envelope conformation with the flap atom displaced by 1.38 (14) Å. The mol­ecular conformation is stabilized by an intra­molecular C—H...O hydrogen bond, which generates an S(9) ring motif. In the crystal, pairs of C—H...O hydrogen bonds link centrosymmetrically related mol­ecules into dimers, generating R₂²(22) ring motifs. The crystal packing is further stabilized by C—H...π inter­actions.

(Z)-3-(2-Meth­oxy­benz­yl)-1,5-benzo­thia­zepin-4(5H)-one

In the title compound, C₁₇H₁₅NO₂S, the seven-membered thia­zepine ring adopts a distorted twist-boat conformation. The dihedral angle between the mean planes of the benzothia­zepin ring system and the attached benzene ring is 47.7 (1)°. In the crystal, pairs of N—H...O hydrogen bonds link inversion-related mol­ecules into dimers, generating R₂²(8) ring motifs. These dimers are further connected into a chain along the a axis by C—H...O hydrogen bonds, resulting in R₂²(14) ring motifs. The crystal packing also features C—H...π inter­actions.

(Z)-3-(4-Chloro­benz­yl)-1,5-benzothia­zepin-4(5H)-one

In the title compound, C₁₆H₁₂ClNOS, the seven-membered thia­zepine ring adopts a distorted twisted boat conformation. The dihedral angle between the least-squares planes of the 1,5-benzothia­zepine ring system and the benzene ring is 50.2 (1)°. In the crystal, pairs of N—H...O hydrogen bonds link centrosymmetrically related mol­ecules into dimers, generating R₂²(8) ring motifs. The crystal packing is further stabilized by π–π inter­actions [centroid–centroid distance = 3.763 (2) Å].

(E)-Methyl 2-[(1,3-dioxoisoindolin-2-yl)meth­yl]-3-phenyl­acrylate

In the title compound, C₁₉H₁₅NO₄, the isoindole ring system is essentially planar [maximum deviation = 0.011 (1) Å] and is oriented at a dihedral angle of 75.7 (1)° with respect to the phenyl ring. The mol­ecular conformation is stabilized by an intra­molecular C—H...O hydrogen bond. The crystal packing is stabilized by C—H...O hydrogen bonds, which generate zigzag chains along the a axis. The crystal packing is further stabilized by a C—H...π inter­action.

Methyl (E)-2-cyano-3-(6-nitro-1,3-benzodioxol-5-yl)acrylate

In the title compound, C₁₂H₈N₂O₆, the 1,3-benzodioxole ring system is essentially planar [maximum deviation = 0.036 (2) Å] and the nitro group is oriented at a dihedral angle of 15.4 (1)° with respect to its mean plane. In the crystal, moleucles are linked into C(8) [101] chains by C—H...O hydrogen bonds, and weak aromatic π–π stacking [centroid–centroid distance = 3.887 (1) Å] also occurs.