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Synthese von Pyrano[2,3-c]pyrazol-3-onen Über Pyrazole

✍ Scribed by K. Michel; M. Matter

Publisher: John Wiley and Sons
Year: 1961
Tongue: German
Weight: 440 KB
Volume: 44
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19610440420

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✦ Synopsis

Abstract

Es wird die Synthese von einigen γ‐Halogenpropyl‐pyrazolidin 3,5‐dionen (I) beschrieben. Deren Salze mit Basen kondensieren sich leicht intramolekular zu Di‐hydropyrano [2,3‐c]pyrazolin‐3‐onen (III und VIII), in welchen der Dihydropyranring hydrolytisch zum entsprechenden γ‐ Hydroxypropyl‐pyrazolidin‐3,5‐dion‐Anion (IV) aufgespalten werden kann.

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