| abstract |
Substituted benzophenones of the formula wherein Ph represents unsubstituted or substituted phenyl and R represents free, esterified or amidated carboxy possess anti-inflammatory and / or amalgetic properties and may be used as active pharmaceutical ingredients. They are prepared, for example, by a compound or a compound mixture of the formula X1 and X2 together is a connected via the carbonyl group with the radical Ph group of the formula -C (O) -O and X3 is hydrogen or one of the radicals X1 and X3 a group of the formula -C (O) -Z, which is other hydrogen and X2 is a group RO- in which R is hydrogen or a hydroxy protecting group which subjects acid treatment and solvolytically decomposes the primary product. |