5-pentyl-pyridine-2-carboxylic acid (4-bromo-benzyl)-[1-(3-methylbutyl)-piperidin-4-yl]-amide 、
5-pentyl-pyridine-2-carboxylic acid (4-cyano-benzyl)-piperidin-4-yl-amide trifluoroacetate 、
异戊醛 以to give 1.88 g (quantitative yield) of 5-pentyl-pyridine-2-carboxylic acid (4-cyanobenzyl)-[1-(3-methyl-butyl)-piperidin-4-yl]-amide (84)的产率得到5-pentyl-pyridine-2-carboxylic acid (4-cyano-benzyl)-[1-(3-methylbutyl)-piperidin-4-yl]-amide