Treatment of 5,6-dimethoxy-2-(methylphenylcarbamoyl)-benzofuran-3carboxylic acid with PPA yielded 2,3-dimethoxy-7-methyl-7,12-dihydro-6H-[1]benzofuro-[2,3-c]-[1]-benzazepin-6,12-dione. The analogous 2-[(5,6-dimethoxybenzofuran-2-carbonyl)methylamino]benzoic acid was resistant to cyclization, whereas 2-[(6methoxybenzofuran-2-carbonyl)-amino]benzoic acid underwent cyclization to the corresponding...

Abstract The preparation 0f azo dyes is the subject of this research. 4-hydroxycoumarin with each ofo-amino benzoic acid (3-[o-Amino acidazo]-4-hydroxycoumarin]) (B 1 ) and Sulfa guanidine (3-[Sulfa azo]-4-hydroxycoumarin) 2 were syntheses. Azo compounds characterized by I.R, CHN, H-NMR Elctronic Mass spectroscopy. At various pH levels, electronic spectra these investigated in terms acid-base p...

In the title compound, C(14)H(10)FNO(2), the benzene rings make a dihedral angle of 57.50 (13)°, and the molecule has an E configuration about the C=N bond. In the crystal, molecules are linked via pairs of O-H⋯O hydrogen bonds, forming inversion dimers.

In the crystal of the title compound, C(14)H(9)Cl(2)NO(2), inversion-related dimers with R(2) (2)(8) ring motifs are formed by inter-molecular O-H⋯O hydrogen bonding. The 3-amino-benzoic acid group and the 2,4-dichlobenzaldehyde moiety subtend a dihedral angle of 55.10 (2)°. The H atom of the carboxyl group is disordered over two sites with equal occupancies.

This research. Included the preparation. and characterization some novel. Six seven membered Heterocyclic. Compounds ( oxazepine , thiazine quinazoline ) The first step in clode react 2-amino-6- methoxybenzothiazole with 4- amino acetophenone to get Schiff base derivative (1). second (1) 4 -hydroxy schiff (2) last involve Phthalic Maleic Succinic) anhydride .get derivatives (3,4and 5) also with...

Ring opening of phthalic anhydride has been carried out in acetic acid with glycine, b-alanine, L-phenylalanine, and 4-aminobenzoic acid to yield, respectively, 2-{[(carboxymethyl)amino]carbonyl}benzoic acid (I), 2-{[(2carboxyethyl)amino]carbonyl}benzoic acid (II), 2-{[(1-carboxy-2-phenylethyl)amino]carbonyl}benzoic acid (III), and 2[(4-carboxyanilino)carbonyl]benzoic acid (IV). Compounds I-IV ...