Methylenedisalicylic acid derivatives: New PTP1B inhibitors that confer resistance to diet-induced obesity

Methylenedisalicylic acid derivatives were synthesized and their inhibitory activities against protein tyrosine phosphalases (PTPases) examined. Two of the compounds, 8 and 9, showed K-i values of 9.4 and 6.3 mu M against PTP I B, 4- and 7-fold lower values compared to those against TC-PTP. They were reversible and slow-binding inhibitors against PTP I B. When compound 8 was fed to a mouse model, the weight gain and adipocyte fat storage induced by a high-fat-diet were significantly suppressed. (c) 2007 Elsevier Ltd. All rights reserved.