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Pyrazines. 2ème communication [1]. II. Synthèse de dihydro-6,7-5H-cyclopenta[b]pyrazines alkylées

✍ Scribed by Ivon Flament; Philippe Sonnay; Günther Ohloff

Publisher
John Wiley and Sons
Year
1973
Tongue
German
Weight
750 KB
Volume
56
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Alkyl‐5__H__‐6,7‐dihydrocyclopenta[b]pyrazines are prepared by condensation of cyclopentenolones with alkylenediamines or of aliphatic α‐diketones with 1,2‐diaminocyclo pentanes. Products so obtained were dehydrogenated using palladium on activated charcoal, or copper chromite. NMR. and mass spectra are given for 21 bicyclic pyrazines and intermediates, and their IR. spectra are compared.

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