Synthesis and Binding Properties of New Endothelin Receptor Ligands

In this paper we report the synthesis of a new series of benzenesulfonamides and the evaluation of their binding properties on ETAh and ETBh receptor subtypes. Some new derivatives behave as selective ETAh receptor ligands and among them, 2-{[(4-chloro-3-methyl-5-isoxazolyl)amino]sulfonyl}-N-(2,4,6- trimethylphenyl)benzamide (23) was the most interesting.