Horváth A, Depré D, A Vermeulen WA, Wuyts SL, Harutyunyan SR, Binot G, Cuypers J, Couck W, Den Heuvel DV. Ring-Closing Metathesis on Commercial Scale: Synthesis of HCV Protease Inhibitor Simeprevir.
J Org Chem 2019;
84:4932-4939. [PMID:
30721066 DOI:
10.1021/acs.joc.8b03124]
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Abstract
The key macrocyclization step in the synthesis of simeprevir, a hepatitis C virus (HCV) antiviral drug, was studied. N-Boc substitution on the diene precursor changes the site of insertion of the metathesis catalyst and, consequently, the kinetic model of the ring closing metathesis (RCM), enabling a further increase in the macrocyclization efficiency under simulated high dilution (SHD) conditions. NMR of the inserted species of both first and second generation RCM catalysts are reported and discussed.
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