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.
3-alcoxy-allenyllithium reagents as β-acyl vinyl anion equivalents. A new synthesis of pyrenophorin.
作者:Fadila Derguini、Gérard Linstrumelle
DOI:10.1016/s0040-4039(01)81680-4
日期:1984.1
3-alcoxy-allenyllithium reagents with electrophiles led to (Z) or (E) keto compounds 3 or 4 after mild acid hydrolysis. Carboxylation led to the 4-oxo-2-alkenoate unit. This reaction was applied to a short synthesis of the macrolide antibiotic, pyrenophorin.
Alternative, High‐Yield Synthesis of<i>(E)</i>‐4‐Oxonon‐2‐enoic Acid from 2‐Methoxyfuran
作者:Ahmet Maras、Ahmet Altay、Roberto Ballini
DOI:10.1080/00397910701739063
日期:2008.1
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.