Oblon, Spivak, McClelland, Maier & Neustadt
Preparation of 2-hydroxy-4-alkoxybenzophenones
 Alkoxybenzophenones of the formula (I) ##STR1## wherein R.sup.1 is C.sub.1 -C.sub.4 -alkyl and R.sup.2 and R.sup.3 independently of one another are each hydrogen, hydroxy, C.sub.1 -C.sub.8 -alkoxy, C.sub.1 -C.sub.4 -alkyl or halogen, are prepared by reacting a benzophenone of the formula (II) ##STR2## with a dialkyl sulfate of the formula (III) EQU (R.sup.1 O).sub.2 SO.sub.2 (III) where, in the formulae, R.sup.1, R.sup.2 and R.sup.3 have the above-mentioned meanings, by a process in which the reaction is carried out in water as the reaction medium in the presence of a base, and the dialkyl sulfate (III) is added a little at a time. The process gives (I) in high yield and virtually free of 2,4-dialkoxybenzophenones. 
BASF Aktiengesellschaft
C C
C07C C07C
inventional inventional
Alexander Peter
Aumueller Neumann