Hydrochloric Acid → Ethyl 4-{3-[4-(4-methylphenylmethoxy)-3-(3-chloropropoxy)benzoyl]indol-1-yl}butanoate

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반응 단계

Ethyl 4-{3-[3-hydroxy-4-(4-methylphenylmethoxy) benzoyl]indol-1-yl}butanoate (2.77 g) obtained in Step 1 was dissolved in N,N-dimethylformamide (30 ml). 1-Bromo-3-chloropropane (1.39 g) and potassium carbonate (0.97 g) were added to the resultant solution and stirred for 6 hours at 60° C. The reaction mixture was poured into 2N HCl and extracted with ethyl acetate. The resultant extract was sequentially washed with saturated sodium bicarbonate solution and brine and then dried. The solvent was distilled off. The residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=3:1), obtaining 2.67 g of ethyl 4-{3-[4-(4-methylphenylmethoxy)-3-(3-chloropropoxy)benzoyl]indol-1-yl}butanoate as a light yellow oily substance.

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