Acetic acid, 2-(triphenylphosphoranylidene)-, methyl ester → HCID 14347275, compound

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Reaction Steps

As described in Example 99, (E)-3-(4-methoxyphenyl)-3-phenyl-2-propenal (8.7 g) was reacted with (carbomethoxymethylene)triphenylphosphorane (14.2 g) in carbon tetrachloride (50 mL) and dichloromethane (5 mL) overnight at room temperature. The crude ester was isolated in the usual manner and was purified by HPLC (ether-hexane; 3:17) to yield 8.6 g of (E,E)-5-(4-methoxyphenyl)-5-phenyl-2,4-pentadienoic acid methyl ester. Crystallization of a portion from ethyl acetate-hexane gave the analytical specimen, mp 88°-89.5° C. Anal. Calcd for C19H18O3 : C, 77.53; H, 6.19 Found: C, 77.40; H. 6.18

Provenance & Evidence