Patent ID: 6242598
Filing Date: 2001-06-05
Classification: C07D

Abstract:
A process for preparing a compound of formula I ##STR40##whereX is hydrogen, alkyl of 1 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms or halogen, andR.sub.1, R.sub.2 and R.sub.3 are each independently hydrogen, alkyl of 1 to 12 carbon atoms, hydroxy, alkoxy of 1 to 12 carbon atoms, halogen, phenyl or phenyl substituted by alkyl of 1 to 12 carbon atoms, hydroxy, alkoxy of 1 to 12 carbon atoms or halogen,which process comprises(1). reacting cyanuric chloride ##STR41##with a phenolic compound of formula II ##STR42##to form a compound of formula III ##STR43##(2). reacting the compound of formula III with an aromatic hydrocarbon of formula ##STR44##in the presence of an effective amount of a Lewis acid catalyst to give a compound of formula V ##STR45##(3). reacting the compound of formula V with a compound of formula VI ##STR46##in the presence of an effective amount of a protic acid catalyst or a Lewis acid catalyst or a combination of protic acid and Lewis acid catalysts to give the compound of formula I.