Novel 2,3-diketopiperazine derivatives or their salts

C - Chemistry – Metallurgy – 07 – D

Patent

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Details

C07D 241/08 (2006.01) A61K 31/495 (2006.01) A61K 31/535 (2006.01) A61K 31/675 (2006.01) A61K 31/695 (2006.01) C07D 401/02 (2006.01) C07D 401/06 (2006.01) C07D 403/06 (2006.01) C07D 405/02 (2006.01) C07D 405/06 (2006.01) C07D 409/06 (2006.01) C07D 413/06 (2006.01) C07D 417/06 (2006.01) C07D 471/04 (2006.01) C07F 7/10 (2006.01) C07F 9/6509 (2006.01) C07K 5/078 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2206053

A 2,3-diketopiperazine derivative represented by general formula (1) or a salt thereof, having the effect of inhibiting platelet agglutination in virtue of the glycoprotein IIb/IIIa receptor antagonism, and being useful as a preventive and remedy for diseases wherein platelet agglutination participates, wherein R1 represents optionally protected amidino; R2 represents hydrogen or a carboxyl-protective group; A represents optionally substituted lower alkylene; B represents -O-, -CONH-, -NHCO- or -SO2NH-; Y represents optionally substituted lower alkylene; and the broken line represents a single or double bond.

Dérivé de 2,3-dicétopipérazine représenté par la formule générale (1) ou un sel de celui-ci, inhibant l'agrégation plaquettaire de par l'antagonisme aux récepteurs IIb/IIIa de glycoprotéine, et utile en tant qu'agent préventif et remède pour les maladies dans lesquelles l'agrégation plaquettaire intervient. Dans cette formule (1), R?1¿ représente amidino éventuellement protégé; R?2¿ représente hydrogène ou un groupe protecteur carboxyle; A représente alkylène inférieur éventuellement substitué; B représente -O-, -CONH-, -NHCO- ou -SO¿2?NH-; Y représente alkylène inférieur éventuellement substitué; et la ligne en pointillés représente une liaison simple ou double.

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