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  • Title: Discovery of an orally active series of isoxazoline glycoprotein IIb/IIIa antagonists.
    Author: Xue CB, Wityak J, Sielecki TM, Pinto DJ, Batt DG, Cain GA, Sworin M, Rockwell AL, Roderick JJ, Wang S, Orwat MJ, Frietze WE, Bostrom LL, Liu J, Higley CA, Rankin FW, Tobin AE, Emmett G, Lalka GK, Sze JY, Di Meo SV, Mousa SA, Thoolen MJ, Racanelli AL, Olson RE.
    Journal: J Med Chem; 1997 Jun 20; 40(13):2064-84. PubMed ID: 9207948.
    Abstract:
    Using isoxazoline XR299 (1a) as a starting point for the design of highly potent, long-duration GPIIb/IIIa antagonists, the effect of placing lipophilic substituents at positions alpha and beta to the carboxylate moiety was evaluated. Of the compounds studied, it was found that the n-butyl carbamate 24u exhibited superior potency and duration of ex vivo antiplatelet effects in dogs. Replacement of the benzamidin-4-yl moiety with alternative basic groups, elimination of the isoxazoline stereocenter, and reversal of the orientation of the isoxazoline ring resulted in lowered potency and/or duration of action.
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