4-(3-Methyl-5-nitropyridin-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylic acid tert-butyl ester → 4-(5-Amino-3-methylpyridin-2-yl)piperidine-1-carboxylic acid tert-butyl ester

Participants

Reaction Steps

To 4-(3-methyl-5-nitropyridin-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylic acid tert-butyl ester (5.0 g) were added 1,4-dioxane (50 ml) and 10% palladium carbon (containing about 50% water, 2.0 g), stirred at room temperature for 9 hours under hydrogen atmosphere, then 10% palladium carbon (containing about 50% water, 1.5 g) was additionally added thereto, and stirred at 40° C. for 8.5 hours under hydrogen atmosphere. The reaction solution was filtered through Celite, and then the solvent was evaporated in vacuo to give 4-(5-amino-3-methylpyridin-2-yl)piperidine-1-carboxylic acid tert-butyl ester (4.4 g) as a yellow oil.

Provenance & Evidence