Synthesis and Biological Activity of Various Derivatives of a Novel Class of Potent, Selective, and Orally Active Prostaglandin D<sub>2</sub> Receptor Antagonists. 1. Bicyclo[2.2.1]heptane Derivatives
Novel prostaglandin D(2) (PGD(2)) receptor antagonists were synthesized as a potential new class of antiallergic agents having a bicyclo[2.2.1]heptane ring system with sulfonamide groups. Some of them exhibit extremely potent antagonism of the PGD(2) receptor in radioligand binding and cAMP formation assays with IC(50) values below 50 nM and much less antagonism of TXA(2) and PGI(2) receptors. These
Improved synthesis of (5Z)-7-(3-endo-{(benzenesulfonamido)-bicyclo[2.2.1]heptyl}hept-5-enoic acid (S-145) derivatives and their iodine-125-labeled radioligands for the study of thromboxane A2 receptor
作者:Wai Ming Kan、Hsin-Hsiung Tai
DOI:10.1016/0009-3084(93)90081-d
日期:1993.4
(5Z)-7-(3-endo-[(benzenesulfonamido)-bicyclo[2.2.1]heptyl)-h ept-5-enoic acid (S145) and its analogs has been designed. The procedure involves direct sulfonylation of 2-allyl-3-aminobicyclo[2.2.1]heptane intermediate followed by ozonolysis and addition of a C5 carboxyl unit. The yield of the final product was significantly improved. (5Z)-7-(3-endo-[(4-iodobenzenesulfonamido)-bicyclo [2.2.1]heptyl)hept-5-enoic acid (HS-145)
Synthesis and in vitro activity of various derivatives of a novel thromboxane receptor antagonist, (.+-.)-(5Z)-7-[3-endo[(phenylsulfonyl)amino]bicyclo[2.2.1]hept-2-exo-yl]heptenoic acid
Several sulfonyl derivatives (13a-t) of (+/-)-(5Z)-7-(3-endo-aminobicyclo[2.2.1]hept-2-exo-yl)heptenoic acid (VI) were synthesized via its methyl ester 10. Sulfonylation of 10 with 11a-t followed by saponification yielded 13a-t. Inhibitory concentrations (IC50) of the corresponding sodium salts 14a-t for plateletaggregation were measured with rat washed platelets (WP) and rabbit platelet-rich plasma