103 research outputs found
Phthalazin-1(2H)-one–picric acid (1/1)
The geometric parameters of the title compound, C8H6N2O·C6H3N3O7, are in the usual ranges. The three nitro groups are almost coplanar with the aromatic picrate ring [dihedral angles 10.2 (2)°, 7.62 (16) and 8.08 (17)°]. The molecular conformation of the picric acid is stabilized by an intramolecular O—H⋯O hydrogen bond. The phthalazin-1(2H)-one molecules are connected via N—H⋯O hydrogen bonds, forming centrosymmetric dimers
A convenient acess to thienyl-substituted phthalazines
A synthesis of 1‐alkoxy‐ and 1‐amino‐ substituted 4‐(2‐thienyl)‐phthalazines is described from halo‐derivatives of 4‐(2‐thienyl)‐l‐(2H)‐phthalazinone 3.Thanks are due to Foundation for Science and Technology (Portugal) for financial support through IBQF (UM) and through FEDER, POCTI (ref. POCTI/QUI/37816/2001).info:eu-repo/semantics/publishedVersio
- …