摘要:
The Michael reaction of phenyl vinyl sulfonate (3) or vinyl sulfonamide 12 with phenylacetic esters was the key step in a general synthesis of 4-phenyl-substituted 1,2-thiazane, 1,1-dioxides (sultams) and 5-phenyl-1,2-oxathiane 1,1-dioxides (sultones). This methodology was applied to the synthesis of some cyclic sulfonamide and sulfonate derivatives (I and II) of the potent TXA2 receptor antagonists BM.13177 and BM.13505.