✦ LIBER ✦

Reaktionen mit Isobutyraldehyd, III1) 4-Hydroxy-2.8-diisopropyl-3.3.9.9-tetramethyl-perhydro-pyrimido[4.3-b] [1.3]oxazin-6-on

✍ Scribed by Schwenk, Ulrich ;Becker, Adolf

Publisher: Wiley (John Wiley & Sons)
Year: 1970
Weight: 477 KB
Volume: 734
Category: Article
ISSN: 0074-4617
DOI: 10.1002/jlac.19707340116

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✦ Synopsis

Abstract

Aus Harnstoff und 2 Mol α.α′‐Dichlor‐diisobutyläther (1) entsteht 4‐Hydroxy‐2.8‐diisopropyl‐3.3.9.9‐tetramethyl‐perhydropyrimido[4.3‐b][1.3]oxazin‐6‐on (3). Dieses läßt sich zu dem sehr stabilen Heterocyclus 6 hydrieren. Die Struktur von 3 wird durch Abbau zu 7‐12 sowie durch Synthese von 6 aus Isobutyraldol (16) und 14 bewiesen.

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