878672-00-5Relevant articles and documents
Characterization of stereoselective metabolism, inhibitory effect on uric acid uptake transporters, and pharmacokinetics of lesinurad atropisomers
Yang, Chun,Zhou, Dongmei,Shen, Zancong,Wilson, David M.,Renner, Matthew,Miner, Jeffrey N.,Girardet, Jean-Luc,Lee, Caroline A.
, p. 104 - 113 (2019)
Lesinurad [Zurampic; 2-(5-bromo-4-(4-cyclopropylnaphthalen-1-yl)-4H-1,2,4-triazol-3-ylthio)], a selective inhibitor of uric acid reabsorption transporters approved for the treatment of gout, is a racemate of two atropisomers. The objective of this investigation was to evaluate the stereoselectivity of metabolism, the inhibitory potency on kidney uric acid reabsorption transporters (URAT1 and OAT4), and the clinical pharmacokinetics of the lesinurad atropisomers. Incubations with human liver microsomes (HLM), recombinant CYP2C9, and recombinant CYP3A4 were carried out to characterize the stereoselective formation of three metabolites: M3 (hydroxyl-ation), M4 (a dihydrodiol metabolite), and M6 (S-dealkylation). The formation of M3 in HLM with atropisomer 1 was approximately twice as much as that with atropisomer 2, whereas formation of M4 with atropisomer 1 was 8- to 12-fold greater than that with atropisomer 2. There were no significant differences in the plasma protein binding among lesinurad and the atropisomers. Following oral administration of 400 mg lesinurad once daily for 14 days to healthy human volunteers, the systemic exposure (Cmax at steady state and area under the concentration-time curve from time zero to the time of dosing interval) of atropisomer 1 was approximately 30% lower than that of atropisomer 2, whereas renal clearance was similar. In vitro cell-based assays using HEK293 stable cells expressing URAT1 and OAT4 demonstrated that atropisomer 2 was approximately 4-fold more potent against URAT1 than atropisomer 1 and equally active against OAT4. In conclusion, lesinurad atropisomers showed stereoselectivity in clinical pharmacokinetics, metabolism, and inhibitory potency against URAT1.
Synthesis of lesinurad via a multicomponent reaction with isocyanides and disulfides
Li, Yaoqi,Sun, Zhihua
supporting information, (2020/07/21)
An efficient synthesis of Lesinurad a selective uric acid reabsorption (URAT1) inhibitor, is described in this article. The route to synthesis of Lesinurad avoids the use of thiophosgene and the formation of thiols. The key reaction in this synthesis is construction of the 1,2,4-Triazole ring in 72percent yield. The title product is obtained in 45percent yield over 5 steps.
Method for purifying Lesinurad impurity
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Paragraph 0034-0037, (2020/07/12)
The invention relates to a method for purifying a Lesinurad impurity. The purification route is shown in the specification. The method is simple and safe in operation, good in yield, high in product purity, good in economic effect and suitable for industrial production.