4-Propoxybenzaldehyde → 6-(p-Propoxyphenyl)-5-hexenoic acid

Beteiligte Stoffe

Reaktionsschritte

This compound was synthesized from 4-carboxybutyltriphenylphosphonium bromide (8.87 g, 20 mmol) and p-propoxybenzaldehyde (3.28 g, 20 mmol, synthesized from p-hydroxybenzaldehyde and 1-iodopropane) in THF (100 mL) by a Wittig reaction. Crystallization (petroleum ether) afforded the product (3.75 g, 76%) as white crystals (mp, 49°-50° C.). IR: 3400-2500, 1725 cm-1 ; 1H-NMR: 1.00 (t, 3H), 1.75 (m, 4H), 2.35 (m, 4H), 3.90 (t, 2H), 5.55 (m, 1H), 6.35 (m, 1H), 7.00 (g, 4H), 11.30 (bs, 1H). Anal. Calcd. for C15H20O3 : C, 72.55, H, 8.12%; Found: C, 72.45, H, 8.13%. Z:E=35:65.

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