Boehringer Ingelheim International Gmbh

Andreas Zopf

Uwe Joerg Ries

Guenther Huchler

Werner Rall

Ulrike Werthmann

Stefan Goepper

Michael Konrad

Sonja Sproll

Kathrin Pachur

Kathrin Maier

A process for preparing compounds of the formula (I) in which R, R, Rand Rare as defined in the description.

Preparation process

The present invention relates to the new crystalline compounds A of general formula I wherein A, A, A, X, Y, Yand Yare defined as in claim, and which are present in the form of their physiologically acceptable salts with acids, the acids being selected from the group B comprising hydrochloric acid, hydrobromic acid, sulphuric acid, phosphoric acid, benzenesulphonic acid, p-toluenesulphonic acid, maleic acid, succinic acid, fumaric acid, D-(&#x2212;)-tartaric acid, L-(+)-tartaric acid, naphthalene-2-sulphonic acid and naphthalene-1,5-disulphonic acid, and the polymorphs, the corresponding solvates and hydrates thereof.

Crystalline compounds

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Munich, Georgia

Andreas Zopf