Synthesis of <sup>13</sup>
C<sub>6</sub>
-labeled, dual-target inhibitor of cannabinoid-1 receptor (CB<sub>1</sub>
R) and inducible nitric oxide synthase (iNOS)
作者:Malliga R. Iyer、Resat Cinar、Nathan J. Coffey、George Kunos
DOI:10.1002/jlcr.3639
日期:2018.8
Cannabinoid-1 receptor (CB1R) antagonists/inverse agonists have great potential in the treatment of metabolic disorders like dyslipidemia, type 2 diabetes, and nonalcoholic steatohepatitis. Cannabinoid-1 receptor inverse agonists have also been reported to be effective in mitigating fibrotic disorders in murine models. Inducible nitric oxide synthase is another promising target implicated in fibrotic and inflammatory disorders. We have disclosed MRI-1867 as a potent and selective, peripherally acting dual-target inhibitor of the CB1R and inducible nitric oxide synthase (iNOS). Herein, we report the synthesis of [13C6]-MRI-1867 as a racemate from commercially available chlorobenzene-13C6 as the starting, stable-isotope label reagent. The racemic [13C6]-MRI-1867 was further processed to the stable-isotope-labeled enantiopure compounds using chiral chromatography. Both racemic [13C6]-MRI-1867 and S-13C6-MRI-1867 will be used to quantitate unlabeled S-MRI-1867 during clinical drug metabolism and pharmacokinetics studies and will be used as a liquid chromatography-tandem mass spectrometry bioanalytical standard.
大麻素 1 受体 (CB1R) 拮抗剂/反向激动剂在治疗血脂异常、2 型糖尿病和非酒精性脂肪肝炎等代谢性疾病方面具有巨大潜力。据报道,大麻素 1 受体反向激动剂可有效减轻小鼠模型中的纤维化疾病。诱导型一氧化氮合酶是纤维化和炎症性疾病中另一个有前景的靶点。我们已公开 MRI-1867 作为 CB1R 和诱导型一氧化氮合酶 (iNOS) 的有效、选择性、外周作用双靶点抑制剂。在此,我们报道了以市售氯苯-13C6 作为起始稳定同位素标记试剂合成外消旋体的[13C6]-MRI-1867。使用手性色谱将外消旋[13C6]-MRI-1867进一步加工成稳定同位素标记的对映体纯化合物。外消旋[13C6]-MRI-1867和S-13C6-MRI-1867都将用于在临床药物代谢和药代动力学研究中定量未标记的S-MRI-1867,并将用作液相色谱-串联质谱生物分析标准品。