2-Formyl-3-[(thiophene-2-yl)methyl]-5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalene → 4-[(E)-2-(5,5,8,8-tetramethyl-3-thiophen-2ylmethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)vinyl]benzoic acid

Participants

Reaction Steps

Horner-Emmons olefination (following the procedure of Example) of 2-formyl-3-[(thiophene-2-yl)methyl]-5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalene (94 mg, 0.3 mmol) followed by ester hydrolysis (following the procedure of Example) of ethyl (E)-4-{2-[3-((thiophene-2-yl)methyl)-5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-naphthalen-2-yl]vinyl}benzoate (53 mg, 0.11 mmol) provides 4-[(E)-2-(5,5,8,8-tetramethyl-3-thiophen-2ylmethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)vinyl]benzoic acid (30 mg, 63%) as a white crystalline solid 44 (m.p. 229.1-229.6° C.).

Provenance & Evidence