3-Acetoxy or benzyloxy-2-acetoxymethyl-6-[1-acetoxy-2-(N-tert-butylacetamido)ethyl]pyridine intermediates

摘要

Processes and intermediates useful in the preparation of bronchodilator compounds of the formula wherein R is hydrogen, methyl or hydroxymethyl are described. Those compounds wherein R is H or CH3 have been found to have further utility as intermediates for pirbuterol (wherein R is hydroxymethyl).