Thorium(IV) complexes with some ortho-substituted Schiff base ligands
作者:Wissam I. Azeez
DOI:10.1016/s0020-1693(00)84854-9
日期:1990.10
Thorium(IV) thiocyanate, chloride and nitrate complexes with Schiff bases L (ortho-XC6H4CH = NC6H4COOH) derived from o-XC6H4CHO and 2-carboxyaniline have been prepared. The ligands acted as deprotonated uninegative tridentate molecules when X = OH or deprotonated uninegative bidentate ones when X = Cl, OCH3 or NO2. The resulting thorium(IV) centres in the complexes are therefore eight- or six-coordinated, respectively.
Synthesis of some newer derivatives of 2-amino benzoic acid as potent anti-inflammatory and analgesic agents
Diazotization of N-benzylidene anthranilic acids 1a-1n at pH 9 yielded N-[alpha-(phenylazo) benzylidene] anthranilic acids 2a-2n and at pH 3 yielded N-benzylidene-5-(phenylazo) anthranilic acids 3a-3n. When compounds 3a-3n were treated with thioglycolic/thiolactic acid in the presence of anhydrous ZnCl(2), 2-(4-oxo-2-phenylthiazolidin-3-yl)-5-(phenylazo) benzoic acids 4a-4n were afforded. The newly synthesized