Synthesis and biological evaluation of 4,4-dimethyl lithocholic acid derivatives as novel inhibitors of protein tyrosine phosphatase 1B
摘要:
Protein tyrosine phosphatase 1B (PTP1B) is a major negative regulator of both insulin and leptin signals. For years, inhibiting of PTP1B has been considered to be a potential therapeutics for treating Type 2 diabetes and obesity. Recently, we recognized lithocholic acid (LCA) as a natural inhibitor against PTP1B (IC50 = 12.74 mu M) by a vertical screen for the first time. Further SAR research was carried out by synthesizing and evaluating a series of compounds bearing two methyls at C-4 position and a fused heterocycle to ring A. Among them, compound 14b achieved a PTP1B inhibitory activity about eightfold than LCA and a 14-fold selectivity over the homogenous enzyme TCPTP. (C) 2012 Elsevier Ltd. All rights reserved.
本发明公开了一种如式(I)所示的胆酸衍生物及其制备方法,通过TBS保护、4,4‑二甲基化、脱保护、氧化、Witting反应、还原、水解、酰化及脱保护等反应制备得到目标产物胆酸衍生物。本发明还提供了该胆酸衍生物在制备预防和/或治疗高胆固醇血症,高甘油三酯血症,和抗动脉粥样硬化以及抗非酒精性脂肪性肝炎的药物中的应用,本发明胆酸衍生物不仅能有效促进羟甲基戊二酰辅酶A还原酶(3‑hydroxy‑3‑methyl‑glutaryl‑coenzyme A reductase,HMGCR)降解,还可减少他汀类药物引起的HMGCR蛋白增多,从而降低内源性胆固醇水平,为降胆固醇新药的研发提供有益参考,具有良好的应用前景。
Synthesis of heterocyclic ring-fused analogs of HMG499 as novel degraders of HMG-CoA reductase that lower cholesterol
steatohepatitis (NASH). Before, we disclosed compound HMG499 as a potent HMGCR degrader, which could be a promising agent for treating CVD, however its side-effect of promoting cholesterol accumulation in cells should be eliminated before progression. Herein, a series of novel heterocyclic ring-fused analogs of HMG499 were synthesized and investigated for their activities of stimulating HMGCR degradation using
Protein tyrosine phosphatase 1B (PTP1B) is a major negative regulator of both insulin and leptin signals. For years, inhibiting of PTP1B has been considered to be a potential therapeutics for treating Type 2 diabetes and obesity. Recently, we recognized lithocholic acid (LCA) as a natural inhibitor against PTP1B (IC50 = 12.74 mu M) by a vertical screen for the first time. Further SAR research was carried out by synthesizing and evaluating a series of compounds bearing two methyls at C-4 position and a fused heterocycle to ring A. Among them, compound 14b achieved a PTP1B inhibitory activity about eightfold than LCA and a 14-fold selectivity over the homogenous enzyme TCPTP. (C) 2012 Elsevier Ltd. All rights reserved.