PPh3·HBr–DMSO: A Reagent System for Diverse Chemoselective Transformations
摘要:
The broad applicability of the hitherto unexplored reagent combination PPh3 center dot HBr-DMSO is exemplified with multiple highly diverse one-step transformations to synthetically useful building blocks, such as flavones, 4H-thiochromen-4-ones, alpha-hydroxy ketones, 1,4-naphthoquinones (including vitamin K-3), 2-bromo-3-substituted-1H-1-indenones, 2-rnethylthio-1H-1-indenones, 3-butyne-1,2-dione, and 4-pentene-2,3-diones. The simple and mild reaction conditions make the reagent superior in terms of yield and substrate scope in comparison with the existing alternatives.
The present disclosure is generally directed to antiviral compounds, and more specifically directed to compounds which can inhibit the function of the NS5A protein encoded by Hepatitis C virus (HCV), compositions comprising such compounds, and methods for inhibiting the function of the NS5A protein.