Synthesis of Novel Potent Dipeptidyl Peptidase IV Inhibitors with Enhanced Chemical Stability: Interplay between the N-Terminal Amino Acid Alkyl Side Chain and the Cyclopropyl Group of α-Aminoacyl-<scp>l</scp>-<i>cis</i>-4,5-methanoprolinenitrile-Based Inhibitors
作者:David R. Magnin、Jeffrey A. Robl、Richard B. Sulsky、David J. Augeri、Yanting Huang、Ligaya M. Simpkins、Prakash C. Taunk、David A. Betebenner、James G. Robertson、Benoni E. Abboa-Offei、Aiying Wang、Michael Cap、Li Xin、Li Tao、Doree F. Sitkoff、Mary F. Malley、Jack Z. Gougoutas、Ashish Khanna、Qi Huang、Song-Ping Han、Rex A. Parker、Lawrence G. Hamann
DOI:10.1021/jm049924d
日期:2004.5.1
inhibitors to date suffer from chemical instability stemming from an amine to nitrile intramolecular cyclization. Installation of a cyclopropyl moiety at either the 3,4- or 4,5-position of traditional 2-cyanopyrrolidide proline mimetics led to compounds with potent inhibitory activity against the enzyme. Additionally, cis-4,5-methanoprolinenitriles with beta-branching in the N-terminal amino acid provided enhanced
合成了一系列含甲氧脯氨酸腈的二肽模拟物,并将其作为N端序列特异性丝氨酸蛋白酶二肽基肽酶IV(DPP-IV)的抑制剂进行了分析。DPP-IV的催化作用是降解胰高血糖素样肽1的主要手段,胰高血糖素样肽1是葡萄糖刺激的胰岛素分泌的关键介质,而DPP-IV的抑制显示出作为治疗2型糖尿病的新机制的临床益处。但是,迄今为止,许多可逆性抑制剂都具有从胺到腈分子内环化的化学不稳定性。在传统的2-氰基吡咯啉脯氨酸模拟物的3,4-或4,5-位上安装环丙基部分会导致产生对该酶具有强抑制活性的化合物。此外,顺式4 N末端氨基酸带有β支链的5-甲基脯氨酸腈提供了增强的化学稳定性和高抑制力。这类抑制剂还显示了在雄性Zucker大鼠口服葡萄糖激发后抑制餐后葡萄糖升高的能力。