Ethyl bromoacetate → (1RS,3RS)-3-(2-carboethoxymethoxy-4-methoxyphenyl)-1-(3,4-methylenedioxyphenyl)-5-(prop-1-yloxy)indane

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Reaction Steps

To a slurry of sodium hydride (5 mg, 0.21 mmol) in dimethylformamide (0.5 ml) was added (1RS ,3RS)-3-(2-hydroxy-4-methoxyphenyl)-1-(3,4-methylenedioxyphenyl)-5-(prop-1-yloxy)indane (0.058 g, 0.14 mmol) at ice-bath temperature under argon. After stirring for 15 min, ethyl bromoacetate (50 μl, 0.2 mmol) was added and the solution stirred for 1 h at room temperature. The product was partitioned between ethyl acetate and 3 M aq HCl. The organic extract was washed with water, sat. aq. NaHCO3 solution and finally brine. After drying (MgSO4 anhydrous) filtration and evaporation followed by chromatography gave (1RS,3RS)-3-(2-carboethoxymethoxy-4-methoxyphenyl)-1-(-3,4-methylenedioxyphenyl)-5-(prop-1-yloxy)indane (0.041 g). The product was dissolved in hot ethanol (10 ml) and 1 M aq. NaOH added (1 ml). The mixture was refluxed for 1 h then cooled, acidified with 6 M-aqueous HCl and extracted with ethyl acetate. After evaporation the residue was crystallized from ethyl acetate/hexane to give the title compound (0.035 g, 93%). m.p. 177-178° C.

Provenance & Evidence