TAILIEUCHUNG - Kato et al. Organic and Medicinal Chemistry Letters 2011, 1:7

Kato et al. Organic and Medicinal Chemistry Letters 2011, 1:7 ORIGINAL Open Access Synthesis and pharmacological characterization of potent, selective, and orally bioavailable isoindoline class dipeptidyl peptidase IV inhibitors Noriyasu Kato1*, Mitsuru Oka1, Takayo Murase1, Masahiro Yoshida1, Masao Sakairi1, Mirensha Yakufu3, Satoko Yamashita1, Yoshika Yasuda1, Aya Yoshikawa2, Yuji Hayashi1, Masahiro Shirai1, Yukie Mizuno1, Mitsuaki Takeuchi1, Mitsuhiro Makino1, Motohiro Takeda1 and Takuji Kakigami2 Abstract Focused structure-activity relationships of isoindoline class DPP-IV inhibitors have led to the discovery of 4b as a highly selective, potent inhibitor of DPP-IV. In vivo studies in Wistar/ST rats showed that 4b was converted into the strongly active metabolite 4l in. | Kato et al. Organic and Medicinal Chemistry Letters 2011 1 7 http content 1 1 7 o Organic and Medicinal Chemistry Letters a SpringerOpen Journal ORIGINAL Open Access Synthesis and pharmacological characterization of potent selective and orally bioavailable isoindoline class dipeptidyl peptidase IV inhibitors 1 1 1 1 1 3 Noriyasu Kato Mitsuru Oka Takayo Murase Masahiro Yoshida Masao Sakairi Mirensha Yakufu 1 1 2 1 11 Satoko Yamashita Yoshika Yasuda Aya Yoshikawa Yuji Hayashi Masahiro Shirai Yukie Mizuno Mitsuaki Takeuchi1 Mitsuhiro Makino1 Motohiro Takeda1 and Takuji Kakigami2 Abstract Focused structure-activity relationships of isoindoline class DPP-IV inhibitors have led to the discovery of 4b as a highly selective potent inhibitor of DPP-IV. In vivo studies in Wistar ST rats showed that 4b was converted into the strongly active metabolite 4l in high yield resulting in good in vivo efficacy for antihyperglycemic activity. 1. Background With the advent of sitagliptin MK-0431 and vildaglip-tin LAF-237 doubt no longer exists regarding the potential of dipeptidyl peptidase IV DPP-IV CD26 . inhibitors for the treatment of type 2 diabetes 1-4 . Hence intensive research efforts are being continued and have led to the discovery of a number of potent DPP-IV inhibitors Figure 1 5-9 . Research on second-generation DPP-IV inhibitors has focused on selectivity for DPP-IV over other proline-specific dipep-tidyl peptidases especially DPP8 9 since it has been suggested that inhibition of DDP-8 9 is associated with severe toxicity 10 11 . In addition the results of recent clinical trials have indicated that prolonged and marked inhibition of DPP-IV would be beneficial for severely diabetic patients 12 13 . The requirement for prolonged high exposure in humans imposes stringent requirements on the safety profiles and ADME properties of back-up compounds. In this article we describe our preliminary results with potent and selective isoindoline .

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