Acetic Acid → 6-[(Z)-2-(3,4,5-Trimethoxyphenyl)vinyl]-1,2-dihydroxybenzene

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Reaction Steps

A solution of 8 (0.106 g, 0.2 mmol) in 2 mL THF was stirred at 0° while adding acetic acid (0.024 g, 0.4 mmol) and tetrabutylammonium fluoride (1M in THF, 0.4 ml, 0.4 mmol). The solution was stirred at 20° for one hour then cooled to 0° and 0.5 mL water added. The mixture was extracted with TBME three times, dried, evaporated and the residue partitioned between 10 mL heptane/10 mL acetonitrile. Evaporation of the acetonitrile layer gave 0.057 g pale yellow gum which was purified by silica chromatography with 7:3 heptane:ethyl acetate to give ZSB-82 as a colourless gum (0.032 g):

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