A series of 1, 2, 4-oxadiazolidine-3, 5-diones was synthesized and evaluated as oral antihyperglycemic agents in the obese insulin resistant db/db and ob/ob mouse—the two models for Type 2 diabetes mellitus. The majority of the prepared methoxy-and ethoxy- linked oxazole 1, 2, 4-oxadiazolidine-3, 5-diones normalized plasma glucose levels at the 100 mg kg− 1 oral dose in the db/db diabetic mouse model, and several amongst them ...