In an effort to develop dual PPARalpha/gamma activators with improved therapeutic efficacy, a series of diaryl alpha-ethoxy propanoic acid compounds comprising two aryl groups linked by rigid oxime ether or isoxazoline ring were designed and synthesized and their biological activities were examined. Most of the compounds possessing an oxime ether linker were more potent PPARgamma activators than the lead PPARalpha/gamma dual agonist, tesaglitazar in vitro. Compound 18, one of the derivatives with an oxime ether linker, was found to selectively transactivate PPARgamma (EC 50 = 0.028 microM) over PPARalpha (EC 50 = 7.22 microM) in vitro and lower blood glucose in db/ db mice more than muraglitazar after oral treatment for 11 days.
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