Process for preparing substituted pyridines

   
   

A process for preparing a compound of the formula: ##STR1## wherein n, R.sup.1, R.sup.2, R.sup.3 and X are as defined above, used as an intermediate in the synthesis of .beta.-adrenergic receptor agonists.

Een proces om een samenstelling van de formule voor te bereiden: ## STR1 ## waarin n, R.sup.1, R.sup.2, R.sup.3 en X zoals hierboven bepaald zijn, gebruikt als tussenpersoon in de synthese van beta.-adrenergic receptoragonists.

 
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