Alternative, High‐Yield Synthesis of(E)‐4‐Oxonon‐2‐enoic Acid from 2‐Methoxyfuran
摘要:
Alkylation of 2-methoxyfuran, followed by in situ TPP-sensitized photooxygenation of 2-methoxy-5-pentylfuran in the presence of Me2S, gave methyl (Z)-4-oxonon-2-enoate. Hydrolysis of methyl (Z)-4-oxonon-2-enoate afforded (E)-4-oxonon-2-enoic acid in three steps and in 79% overall yield.