Helvetica Chimica Acta

Selektive Umfunktionalisierung der terminalen Amidgruppe offenkettiger Polyamide via 2??Oxazolin??5??one als Zwischenstufen. Vorläufige Mitteilung

D Obrecht, H Heimgartner

文献索引：Obrecht, Daniel; Heimgartner, Heinz Helvetica Chimica Acta, 1981 , vol. 64, # 2 p. 482 - 487

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被引用次数: 23

摘要

Summary Treatment of aqueous or alcoholic solutions of diamides of type 2 with HC1 leads to the formation of amide-acids and amide-esters of type 3 (Scheme I and Table). It has been shown, that 2-oxazolin-5-ones of type 4 are intermediates of this selective transformation of the disubstituted terminal amide group. The selectivity of the transformation is demonstrated by the reaction sequence shown in Scheme 3. No selectivity has been observed in the ...