916078-41-6Relevant academic research and scientific papers
Beyond organic solvents: synthesis of a 5-HT4receptor agonist in water
Bailey, J. Daniel,Helbling, Edward,Mankar, Amey,Stirling, Matthew,Hicks, Fred,Leahy, David K.
supporting information, p. 788 - 795 (2021/02/09)
Reducing or eliminating organic solvent use in pharmaceutical manufacturing is perhaps the most effective way to reduce the environmental, health, and safety impacts of drug substance manufacturing. With this in mind, we have developed a process to manufacture an investigational 5-HT4receptor agonist that is conducted almost entirely in water, including multiple controlled isolations. Key transformations carried out in aqueous media include a benzimidazole cyclization, amide bond formation, reductive amination, and a selective oxidation of an aliphatic alcohol. Compared to the first-generation manufacturing process using organic solvents, the aqueous process described here uses 77% less material inputs, 94% less organic solvent, and, surprisingly, 48% less water, while improving overall yield from 35% to 56%.
Novel spiroketal pyrrolidine GSK2336805 potently inhibits key hepatitis C virus genotype 1b mutants: From lead to clinical compound
Kazmierski, Wieslaw M.,Maynard, Andrew,Duan, Maosheng,Baskaran, Sam,Botyanszki, Janos,Crosby, Renae,Dickerson, Scott,Tallant, Matthew,Grimes, Rick,Hamatake, Robert,Leivers, Martin,Roberts, Christopher D.,Walker, Jill
, p. 2058 - 2073 (2014/04/03)
Rapid clinical progress of hepatitis C virus (HCV) replication inhibitors, including these selecting for resistance in the NS5A region (NS5A inhibitors), promises to revolutionize HCV treatment. Herein, we describe our explorations of diverse spiropyrrolidine motifs in novel NS5A inhibitors and a proposed interaction model. We discovered that the 1,4-dioxa-7-azaspiro[4.4]nonane motif in inhibitor 41H (GSK2236805) supported high potency against genotypes 1a and 1b as well as in genotype 1b L31V and Y93H mutants. Consistent with this, 41H potently suppressed HCV RNA in the 20-day RNA reduction assay. Pharmacokinetic and safety data supported further progression of 41H to the clinic.
BENZIMIDAZOLE-CARBOXAMIDE COMPOUNDS AS 5-HT4, RECEPTOR AGONISTS
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Page/Page column 26, (2008/06/13)
The invention relates to benzimidazole-carboxamide 5-HT 4 receptor agonist compounds of formula (I) wherein R1 and X are as defined in the specification, or a pharmaceutically acceptable salt or solvate or stereoisomer thereof. The invention also relates
