Design and synthesis of a series of indole glycoprotein IIb/IIIa inhibitors

• Published in: European journal of medicinal chemistry 2002, Vol.37 (1), p.45-62
• Main Authors: Grumel, Valérie, Mérour, Jean-Yves, Lesur, Brigitte, Giboulot, Thierry, Frydman, Armand, Guillaumet, Gérald
• Format: Article
• Language: English
• Subjects: Amino acids; Animals; Biological and medical sciences; Blood. Blood coagulation. Reticuloendothelial system; Drug Design; Glycoprotein IIb/IIIa; Guinea Pigs; In Vitro Techniques; Indole derivatives; Indoles - chemical synthesis; Indoles - chemistry; Indoles - pharmacology; Male; Medical sciences; Pharmacology. Drug treatments; Platelet aggregation; Platelet Aggregation - drug effects; Platelet Aggregation Inhibitors - chemical synthesis; Platelet Aggregation Inhibitors - chemistry; Platelet Aggregation Inhibitors - pharmacology; Platelet Glycoprotein GPIIb-IIIa Complex - antagonists & inhibitors; Structure-Activity Relationship
• ISSN: 0223-5234; 1768-3254
• DOI: 10.1016/S0223-5234(01)01325-3

Synthesis of 1,3-disubstituted indoles derivatives as potential glycoprotein (GP) IIb/IIIa antagonists was reported. Substitution of the indolic nitrogen atom by piperidino or benzamidino moieties was used as mimics of an arginine residue. The acid carboxylic group was linked to the indole scaffold in position-3 via a methylene unit (compounds 4, 9, 10). Introduction of a β-alanine chain was carried out on the acids ( 17– 22) which after deprotection and basic hydrolysis afforded the final compounds 39– 46. The distance between the indole scaffold and the amide bond was modulated from no methylene unit (compound 39) to 1 (compounds 40, 41) or 2 methylene units (compounds 42– 46). The presence of a tosylamino group on the β-alanine chain (compound 56) slightly increased the inhibiting action on platelet aggregation initiated by collagen.