Convenient procedure for the synthesis of 2-monoalkylated indol-3-ones
摘要:
2-Alkyl-1,2-dihydroindol-3-ones are prepared from readily available 1-acetyl-2-methoxy-1,2-dihydroindol-3-one by alkylation, reduction with sodium borohydride, and demethoxylation of the resulting 3-hydroxy-2-methoxy-2,3-dihydroindoles with Lewis acids. The stereochemistry of the reduction is also described.
Compounds having the formula (I) wherein Y, R1, R4, A1, A2 and X2 are as defined herein are Hepatitis C virus NS5b polymerase inhibitors. Also disclosed are compositions and methods for treating an HCV infection and inhibiting HCV replication.
Convenient procedure for the synthesis of 2-monoalkylated indol-3-ones
2-Alkyl-1,2-dihydroindol-3-ones are prepared from readily available 1-acetyl-2-methoxy-1,2-dihydroindol-3-one by alkylation, reduction with sodium borohydride, and demethoxylation of the resulting 3-hydroxy-2-methoxy-2,3-dihydroindoles with Lewis acids. The stereochemistry of the reduction is also described.