X-Ray crystal structure of a ligand at the thromboxane A2/prostaglandin H2 receptor site: (4Z)-6-[(2RS,4RS,5SR)-2-(2-chlorophenyl)-4-(2-hydroxyphenyl)-1,3-dioxan-5-yl]hex-4-enoic acid

Abstract

The X-ray crystal structure of a 1,3-dioxane thromboxane receptor antagonist (2) is reported, which shows the presence of both an inter- and an intra-molecular hydrogen bond in the molecule and unexpectedly reveals that the hexenoic acid side chain carboxy group lies over the plane of the 1,3-dioxane ring.