N',N'-dimethylethane-1,2-diamine;hydrochloride

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In an atmosphere of argon, ethyl 2-(4-carboxyphenoxymethyl)-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridine-3-carboxylate (1.22 g, 3.31 mmol) was dissolved in methylene chloride (5.0 ml), and the solution was mixed with N,N-dimethylethylenediamine hydrochloride (0.44 ml, 4.01 mmol) and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) hydrochloride (954.2 mg, 4.98 mmol) at 0° C. and then stirred at room temperature for 15 hours. The reaction solution was diluted with chloroform, mixed with saturated sodium bicarbonate aqueous solution and then extracted with chloroform. The thus obtained organic layer was washed with water and saturated brine in that order and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure and the resulting residue was purified by a silica gel column chromatography (chloroform:methanol=10:1) to obtain the title compound (767.2 mg, 52.7%) as pale yellow amorphous. extracted with chloroform The thus obtained organic layer was washed with water and saturated brine in that order dried over anhydrous sodium sulfate The solvent was evaporated under reduced pressure the resulting residue was purified by a silica gel column chromatography (chloroform:methanol=10:1)