Synthesis and evaluation of some novel dibenzo[ b, d]furan carboxylic acids as potential anti-diabetic agents

A series of novel dibenzo[ b, d]furan mono-carboxylic acid derivatives were synthesized, characterized and evaluated for their ability to inhibit Protein Tyrosine Phosphatase 1B (PTP1B) in vitro in order to use them as potential anti-diabetic agents. Structure–activity relationship study led to the identification of potent compound 5E which inhibited PTP1B with IC 50 value of 82 ± 0.43 nM. Compound 5E was screened in vivo as drug candidate for anti-diabetic activity using rosiglitazone maleate as the standard. Compound 5E showed significant reduction in body weight, fed-state whole blood glucose (WBG), fasting WBG, plasma glucose and plasma cholesterol levels and non-significant reduction in fasting plasma triglyceride levels in ob/ ob mice. A series of dibenzo[ b, d]furan carboxylic acids were synthesized and evaluated for anti-diabetic activity. Compound 5E inhibited PTP1B with IC 50 of 82 nM and reduced WBG and plasma glucose in ob/ ob mice. [Display omitted]