Schaper & Bruemmer Gmbh & Co. Kg

Eckhart Pein

Helmut Ritter

Reinhard Laven

Certain acylated benzilic acid derivatives are useful for influencing therapeutically the tone of the urinary bladder in humans and animals. These derivatives are N-alkyl-4-piperidyl .alpha.,.alpha.-diphenyl-.alpha.-acyloxyacetates having the formula ##STR1## wherein R is H, CH.sub.3, C.sub.2 H.sub.5 or C.sub.3 H.sub.7 ; R' is H, NH.sub.2, phenyl, carboxyphenyl, (C.sub.1 -C.sub.6)alkyl, hydroxy(C.sub.1 -C.sub.6)alkyl, methoxy, ethoxy, methoxymethyl, ethoxymethyl, amino(C.sub.1 -C.sub.6)alkyl which can be substituted in the alkyl radical by one or more of a --NH.sub.2, --COOH or --SCH.sub.3 group, N-acetylamino(C.sub.1 -C.sub.6)alkyl, or a group having the formula

Pharmaceutical compositions containing acylated benzilic acid derivatives

Certain acylated benzilic acid derivatives are useful for influencing therapeutically the tone of the urinary bladder in humans and animals. These derivatives are N-alkyl-4-piperidyl .alpha.,.alpha.-diphenyl-.alpha.-acyloxyacetates having the formula ##STR1## wherein R is H, CH.sub.3, C.sub.2 H.sub.5 or C.sub.3 H.sub.7 ; R' is H, NH.sub.2, phenyl, carboxyphenyl, (C.sub.1 -C.sub.6)alkyl, hydroxy(C.sub.1 -C.sub.6)alkyl, methoxy, ethoxy, methoxymethyl, ethoxymethyl, amino (C.sub.1 -C.sub.6)alkyl which can be substituted in the alkyl radical by one or more of a --NH.sub.2, --COOH or --SCH.sub.3 group, N-acetylamino (C.sub.1 -C.sub.6)alkyl, or a group having the formula

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Northeim, Germany

Eckhart Pein