Chemische Berichte

Acyl??lacton??Umlagerung, XV. Über die Umlagerung von 4??Acyl??oxazolonen??(5)

F Korte, K Störiko

Index: Korte,F.; Stoeriko,K. Chemische Berichte, 1960 , vol. 93, p. 1033 - 1042

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Citation Number: 17

Abstract

Abstract Während sich Acyl-lactone mit Alkohol/H⊕ zu sauerstoffhaltigen Heterocyclen umlagern lassen, reagieren 4-[1-Hydroxy-alkyliden]-oxazolone-(5)(α-Acylazlactone) meist unter Ringöffnung zu α-Acylamino-acylessigsäure-estern. Die Cyclisierung dieser Ester zu Oxazol-carbonsäuren-(4) gelingt in guten Ausbeuten durch Behandeln mit Thionylchlorid oder Acetanhydrid/konz. Schwefelsäure und anschließende alkalische Verseifung. Die ...

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