1H-Benzo[f]indazole-4,9-dione derivatives conjugated with C-protected amino acids (glycine, l-alanine, l-phenylalanine and l-glutamic acid) 6a-l were prepared by chemically modifying the prenyl substituent of 3-methyl-7-(4-methylpent-3-enyl)-1H-benzo[f]indazole-4,9-dione 2 through epoxidation, degradative oxidation, oxidation and N-acyl condensation reactions. The chemical structures of the syn...

An 1,3-indanedione-derived donor–acceptor cyclopropane, bearing the ethoxymethyl-protected phenolic group at ortho-position of donor aryl substituent, has been synthesized using a reaction sequence involving Knoevenagel condensation 1,3-indanedione with corresponding protected salicylaldehyde followed by Corey–Chaykovsky cyclopropanation obtained adduct dimethylsulfoxonium methylide. The struct...

In the mol-ecule of the title compound, C(20)H(16)N(2)O(5), the phthalimide fragments are almost planar, with r.m.s. deviations of 0.018 and 0.020 Å, and make a dihedral angle of 53.64 (3)°. The mol-ecular and crystal structures are stabilized by a weak inter-molecular C-H⋯O, C-H⋯π and C=O⋯π [2.883 (1) Å] inter-actions and aromatic π-π stacking inter-actions with a centroid-centroid distance of...