Potassium Carbonate → (2Z,4E,6E)-2,6-Difluoro-3-methyl-7-(5,5,8,8-tetramethyl-3-propoxy-5,6,7,8-tetrahydro-naphthalen-2-yl)-nona-2,4,6-trienoic acid ethyl ester

Participants

Reaction Steps

Following General Procedure F and using 2,6-difluoro-7-(3-hydroxy-5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)-3-methyl-nona-2,4,6-trienoic acid ethyl ester (Intermediate 24, 2-E/Z mixture, 180 mg, 0.42 mmol), K2CO3 (290 mg, 2.1 mmol), and PrI (0.21 mL, 2.1 mmol) in acetone (2 mL), followed by HPLC (2.5% EtOAc-hexane) separation of the 2-E/Z product mixture, the title compound was obtained as a clear syrup (80 mg, 41%).

Provenance & Evidence