Studies on Novel Bone Resorption Inhibitors. II. Synthesis and Pharmacological Activities of Fused Aza-heteroarylbisphosphonate Derivatives.
作者:Makoto TAKEUCHI、Shunichi SAKAMOTO、Kousei KAWAMUKI、Hiroyuki KURIHARA、Hideaki NAKAHARA、Yasuo ISOMURA
DOI:10.1248/cpb.46.1703
日期:——
Two new series of fused aza-heteroarylbisphosphonates (5, 8), which are structurally quite different from incadronate (YM175), and related compounds were synthesized and evaluated for antiresorptive activity using a parathyroid hormone (PTH)-induced hypercalcemia model in rats (PIH model). Among these compounds, several exhibited more potent antiresorptive activity than pamidronate. In particular, [1-hydroxy-2-(imidazo[1, 2-α]pyridin-3-yl)ethylidene]bisphosphonic acid (5b, minodronate) was 100-fold more potent than pamidronate in not only the PIH model, but also in an immobilization bone atrophy model in rats (DA model), and was selected for clinical development. The structure-activity relationships in these new series of bisphosphonates are discussed.
我们合成了两个新系列的融合杂己基双膦酸盐(5、8),它们在结构上与incadronate(YM175)和相关化合物有很大不同,并利用甲状旁腺激素(PTH)诱导的大鼠高钙血症模型(PIH 模型)对它们的抗骨吸收活性进行了评估。在这些化合物中,有几种表现出比帕米膦酸钠更强的抗骨吸收活性。其中,[1-羟基-2-(咪唑并[1,2-α]吡啶-3-基)亚乙基]双膦酸(5b,minodronate)不仅在 PIH 模型中,而且在大鼠固定骨萎缩模型(DA 模型)中的活性都比帕米膦酸高出 100 倍,因此被选中用于临床开发。本文讨论了这些新系列双膦酸盐的结构-活性关系。