NEW RACEMI AND OPTICALLY ACTIVE OCTAHYDROINDOLO (2,3-A) TETRA- HYDROPIRANIL (2,3-C) QUINOLIDINE DIESTER DERIVATIVE AND ITS PREPARATION
New intermediate compounds are disclosed of the formula I, Ia wherein R1 and R2 are independently alkyl having 1 to 4 carbon atoms, or acid-addition salts thereof of formula Ib, Ib wherein X represents an acid residue, and a process for the preparation of the intermediate compounds.
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Hauptverfasser: | , , , , , , , , , , , , , , , |
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | New intermediate compounds are disclosed of the formula I, Ia wherein R1 and R2 are independently alkyl having 1 to 4 carbon atoms, or acid-addition salts thereof of formula Ib, Ib wherein X represents an acid residue, and a process for the preparation of the intermediate compounds. |
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