Benzaldehyde → 12-Phenyl-11-dodecenoic acid

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Reaction Steps

This compound was synthesized from 10-carboxydecyltriphenylphosphonium bromide (10.55 g, 20 mmol) and benzaldehyde (2.12 g, 20 mmol) in THF (100 mL) by a Wittig reaction. Kugelrohr distillation (bp 152-155° C./0.03 torr) and crystallization afforded the product (2.43 g, 44%) as white crystals (mp 27-27.5° C.). IR: 3400-2500, 1720, 700 cm-1 ; 1H-NMR: 1.30 (m, 10H), 1.40 (m, 2H), 1.62 (m, 2H), 2.35 (m, 4H), 5.65 (m, 1H), 6.40 (m, 1H), 7.25 (m, 5H), 10.40 (bs, 1H). Anal. Calcd. for C18H26O2 : C, 78.79, H, 9.55%; Found: C, 78.66, H, 9.60%. Z:E=93:7.

Provenance & Evidence