Synthesis of methyl (5Z, 8Z, 11E, 14Z, 17Z)- and (5Z, 8Z, 11E, 14Z, 17E)-eicosapentaenoate (EPA Δ 11t and Δ11t, 17t)
摘要:
The ylide of [(E)-6-(tetrahydropyranyloxy)hex-3-enyl] iodide, a common intermediate in the synthesis of EPA Delta 11t and Delta 11t,17t was condensed with (E)- or (Z)-3-hexenal to afford a C12 trienic ether. After transformation of the tetrahydropyranyl ether function into a phosphonium salt in four steps, a second Wittig reaction between the ylide of this salt and a C8 (Z)-unsaturated aldehyde ester provided the title compounds with a purity > 95%.
Synthesis of methyl (5Z, 8Z, 11E, 14Z, 17Z)- and (5Z, 8Z, 11E, 14Z, 17E)-eicosapentaenoate (EPA Δ 11t and Δ11t, 17t)
摘要:
The ylide of [(E)-6-(tetrahydropyranyloxy)hex-3-enyl] iodide, a common intermediate in the synthesis of EPA Delta 11t and Delta 11t,17t was condensed with (E)- or (Z)-3-hexenal to afford a C12 trienic ether. After transformation of the tetrahydropyranyl ether function into a phosphonium salt in four steps, a second Wittig reaction between the ylide of this salt and a C8 (Z)-unsaturated aldehyde ester provided the title compounds with a purity > 95%.
The ylide of [(E)-6-(tetrahydropyranyloxy)hex-3-enyl] iodide, a common intermediate in the synthesis of EPA Delta 11t and Delta 11t,17t was condensed with (E)- or (Z)-3-hexenal to afford a C12 trienic ether. After transformation of the tetrahydropyranyl ether function into a phosphonium salt in four steps, a second Wittig reaction between the ylide of this salt and a C8 (Z)-unsaturated aldehyde ester provided the title compounds with a purity > 95%.