Potassium Carbonate → (R)-1-(2-(((3-phenyl-1-indanylidene)amino)oxy)ethyl)-3-piperidinecarboxylic acid ethyl ester

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Reaction Steps

A mixture of the above oxime (1.1 g, 5 mmol), (R)-1-(2-bromoethyl)-3-piperidinecarboxylic acid ethyl ester hydrobromide (1.7 g, 5 mmol, EP 374801), potassium carbonate (1.7 g, 13 mmol) and acetone (25 ml) was stirred at ambient temperature for 11 days. The mixture was filtered and the solvent evaporated in vacuo. The residue was purified by column chromatography on silica gel (100 g, heptane/ethyl acetate=1/1) to give 1.1 g of (R)-1-(2-(((3-phenyl-1-indanylidene)amino)oxy)ethyl)-3-piperidinecarboxylic acid ethyl ester as an oil.

Provenance & Evidence