Ethyl 5-amino-1-(4-chloro­phenyl-5,5-dimethyl-2-oxo-1,3,2-dioxaphosphinan-2-yl)-3-(6-chloro-3-pyridylmethyl­amino)-1H-pyrazole-4-carboxyl­ate

In the title compound, C₂₃H₂₆Cl₂N₅O₅P, the P atom adopts a distorted tetra­hedral coordination. The terminal ethyl carboxyl­ate group is almost coplanar with the plane of the pyrazole ring. Intra­molecular N—H...O hydrogen bonds influence the overall conformation of the mol­ecule. C—H...π Inter­actions contribute to the crystal packing.

cis-Ethyl 5-amino-1-[4-(4-chloro­phenyl)-5,5-dimethyl-2-oxo-1,3,2-dioxaphosphinan-1-yl]-3-(6-chloro-3-pyridylmethyl­amino)-1H-pyrazole-4-carboxyl­ate

In the title compound, C₂₃H₂₆Cl₂N₅O₅P, the P atom adopts a distorted tetra­hedral configuration. The carboxyl fragment of the ethyl­carboxyl­ate group is almost coplanar with the pyrazole ring. The dihedral angle between the pyrazole and pyridine rings is 82.7 (1)°. Intra­molecular C—H...O, C—H...N and N—H...O hydrogen bonds contribute strongly to the stability of the mol­ecular configuration. C—H...O inter­molecular hydrogen bonds link inversion-related mol­ecules into a centrosymmetric R₂²(10) dimer. In addition, C—H...π hydrogen bonds are observed in the crystal structure.

3-(2-Amino­phen­yl)-2-methyl­sulfanyl-5,6,7,8-tetra­hydro­benzothieno[2,3-d]pyrimidin-4(3H)-one

In the title compound, C₁₇H₁₇N₃OS₂, the fused thio­phene and pyrimidine rings are almost coplanar. The amino group is involved in both intra­molecular and inter­molecular hydrogen bonds, the latter linking the mol­ecules into a centrosymmetric dimer.

trans-4-(4-Chloro­phen­yl)-2-[(2-chloro­phen­yl)(3-pyridylmethyl­amino)meth­yl]-5,5-dimethyl-1,3,2-dioxaphosphinane 2-oxide

In the title compound, C₂₄H₂₅Cl₂N₂O₃P, the P atom adopts a distorted tetra­hedral configuration. Weak inter­molecular N—H...N and C—H...O hydrogen bonds are observed, and C—H...π inter­actions also contribute to the crystal packing.