Ethyl 4-(diethoxyphosphoryl)-3-methylbut-2-enoate → 3-Methyl-5-[3-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthyl)phenyl]penta-2,4-dienoic acid

Participants

Reaction Steps

In a manner similar to that of Example 2(c), by reaction of 2.0 g (6.53 mmol) of 3-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthyl)benzaldehyde obtained in the preceding example and 1.90 g (7.20 mmol) of triethyl 3-methyl-4-phosphonocrotonate, 1.80 g (66%) of the expected compound was obtained in the form of a white powder having a melting point of 83°-85° C.

Provenance & Evidence