Disclosed are compound and pharmaceutically acceptable salts of formula (I): ##STR00001## which are useful in the treatment of metabolic disorders related to insulin resistance, leptin resistance, or hyperglycemia. Compound of the invention include inhibitors of protein tyrosine phosphatase, in particular protein tyrosine phosphatase-1B (PTP-1B), that are useful in the treatment of diabetes and other PTP mediated diseases, such as cancer, neurodegenerative diseases and the like. Also disclosed are pharmaceutical compositions comprising aforementioned conditions using such compounds.