Pyrrolidine-2,3,4-tricarboxylic anhydrides: I. Organocatalytic synthesis and fusion of pyrrole ring by the action of p-fluorobenzylamine
摘要:
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.
Inhibition of the procoagulant activity of blood platelets by vinylsulfonyl derivatives of pyrrolidine-2-carboxylic acid
作者:K. V. Kudryavtsev、N. A. Podoplelova、A. A. Novikova、M. A. Panteleev、D. V. Zabolotnev、N. S. Zefirov
DOI:10.1007/s11172-011-0106-y
日期:2011.4
Novel derivatives of 4-(vinylsulfonyl)pyrrolidine-2-carboxylic acids inhibit the exposure of phosphatidylserine by platelets upon activation with thrombin. The heterocyclic inhibitors were synthesized by 1,3-dipolar cycloaddition of divinyl sulfone to azomethine ylides followed by functionalization of the endocyclic nitrogen atom.