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Heilmittelchemische Studien in der heterocyclischen Reihe. 25. Mitteilung. Pyrazolo-pyrimidine III Paraxanthin-, Theobromin- und Theophyllin-Analoga der Pyrazolo[3,4-d]pyrimidin-Reihe

✍ Scribed by P. Schmidt; K. Eichenberger; J. Dreuey

Publisher
John Wiley and Sons
Year
1959
Tongue
German
Weight
676 KB
Volume
42
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The preparation of the paraxanthine, theobromine and theophylline isomers 1,5‐; 2,5‐ and 1,7‐; 2,7‐ and 5,7‐dimethyl‐4,6‐dioxo‐4,5,6,7‐tetrahydro‐pyrazolo[3,4‐d]‐pyrimidines is described and their structure established. A structurally specific synthesis of the caffeine and isocaffeine isomers 1,5,7‐ and 2,5,7‐trimethyl‐4,6‐ dioxo‐4,5,6,7‐tetrahydro‐pyrazolo [3,4‐d]pyrimidines has been realized.

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