1,2-Ethanediamine, N1,N1-bis(1-methylethyl)- → HCID 39468342, compound

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Reaction Steps

A suspension of 1.1 g (5 mmol) potassium 5-methoxycarbonyl-pyridine-2-carboxylate, 0.9 ml (12 mmol) thionyl chloride and 0.1 ml DMF in 5 ml dichloroethane was heated at reflux for 2 h. To the reaction mixture 5 ml CH2Cl2 were added and the solvent was evaporated. This procedure was repeated three times. The residue was suspended in 5 ml CH2Cl2 and a solution of 9.95 ml (5.5 mmol) 2-diisopropylaminoethylamine, 0.97 ml (7 mmol) triethylamine, 0.1 ml DMF in 5 ml CH2Cl2 was added under ice-cooling. After stirring for 12 h at rt the organic phase was extracted with water, 5% citric acid and aqueous NaHCO3 and dried over magnesium sulfate. After evaporation of the solvent the residue was subjected to silica gel chromatography (20% MeOH and 1% triethylamine in ethyl acetate) to yield 1.15 g (3.7 mmol) 6-(2-diisopropylamino-ethylcarbamoyl)-nicotinic acid methyl ester; exact MW [M+H] calcd: 308.20; MW found [M+H]: 308.20.

Provenance & Evidence