Process for the preparation of chemical compounds

摘要

An improved and efficient synthesis for the preparation of 2-amino-6-[(4-aminopiperidin-1-yl]methyl]pyridine, an intermediate compound in the preparation of muscarinic M3 receptor antagonists, includes as a final step the removal of trimethylacetyl and an amino protecting group from 2-trimethylacetyl-amino-6-[(4-protected aminopiperidin-1-yl)methyl]pyridine.