Journal of Medicinal Chemistry p. 2055 - 2061 (1992)
Update date:2022-08-04
Topics:
Guinn
Summers
Heyman
Conway
Rhein
Albert
Magoc
Carter
A class of N-substituted tetrahydrobenzopyrano[3,4-c]pyridines, I, have been identified as antagonists of platelet activating factor (PAF). The structural features essential for PAF binding were determined by systematic modification of three sites in the molecule. While O-alkyl analogues had little affect on binding potency, N-alkyl analogues exhibited a wide range of activity. Structural changes in the core ring system generally resulted in a loss of binding activity. Optimization of the N- and O-substituents resulted in the analogues 25-27 which exhibited K(i) values ranging between 131 and 167 nM in a [3H]PAF binding assay. Compound 23 was also active in a model of PAF-induced shock in the mouse following intravenous administration.
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