HCID 57112010, compound → HCID 54317759, compound

Participants

Reaction Steps

To a solution of 4-(1,3-dihydro-6-methoxy-7-methyl-3-oxo-4-p-toluenesulfonyloxy-5-isobenzofuranyl)-2-methylbut-2-enaldehyde (0.90 g) in tetrahydrofuran (40 mL) was added vinylmagnesium bromide (4.5 mL of a 1M solution in tetrahydrofuran). After stirring for 0.5 hours, the reaction was diluted with ethyl acetate nd washed successively with aqueous ammonium chloride and brine. Drying over magnesium sulfate was followed by filtration and solvent removal to leave a residual oil, 6-(1,3-dihydro-6-methoxy-7-methyl-3-oxo-4-p-toluenesulfonyloxy-5-isobenzofuranyl)-3-hydroxy-4-methylhexa-1,4-diene, which was carried on without further purification.

Provenance & Evidence