Pyrrolidine-2,3,4-tricarboxylic anhydrides: I. Organocatalytic synthesis and fusion of pyrrole ring by the action of p-fluorobenzylamine
作者:K. V. Kudryavtsev、E. V. Trofimova、A. O. Borisova
DOI:10.1134/s1070428011040142
日期:2011.4
N-Boc-glycine effectively catalyzes 1,3-dipolar cycloaddition of maleic anhydride to N-benzylidene alpha-amino acid esters, which leads to the formation of pyrrolidine-2,3,4-tricarboxylic anhydrides. The subsequent opening of the anhydride fragment in the adducts by the action of p-fluorobenzylamine is regioselective, and it involves recyclization to produce polysubstituted octahydropyrrolo[3,4-b]pyrroles. The newly synthesized fused pyrrolidines inhibit enzymatic activity of thrombin (factor IIA) in vitro.