4-Methyl-5-(2-methyl-propenyl)-pyridine-2-carboxylic acid ethyl ester → 5-Isobutyl-4-methyl-pyridine-2-carboxylic acid ethyl ester

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Reaction Steps

To a solution of 4-methyl-5-(2-methyl-propenyl)-pyridine-2-carboxylic acid ethyl ester (1.33 g, 6.06 mmol) in THF (10 mL) and ethanol (10 mL), Pd/C (300 mg, 10% Pd) is carefully added. The slurry is stirred at rt for 15 h under 2 bar of H2. The catalyst is filtered off and the filtrate is concentrated and dried to give 5-isobutyl-4-methyl-pyridine-2-carboxylic acid ethyl ester (1.27 g) as a colourless oil; LC-MS: tR=0.86 min, [M+1]+=222.10.

Provenance & Evidence