作者:Mark J. Thompson、Harry Adams、Beining Chen
DOI:10.1021/jo900425w
日期:2009.5.15
versatile route to oxazole-5-amides is presented. Conversion of readily accessible oxazole-5-trifluoroacetamides into their Boc-protected 5-aminooxazole derivatives provides intermediates amenable to parallel amide synthesis utilizing a reliable, one-pot, acylation−deprotection procedure. During preparation of the N-Boc compounds from trifluoroacetamides, a competing intramolecular rearrangement giving
提出了恶唑5-酰胺的高度通用的途径。易于获得的恶唑-5-三氟乙酰胺向其Boc保护的5-氨基恶唑衍生物的转化提供了一种中间体,该中间体适合使用可靠的一锅酰化脱保护程序进行平行酰胺合成。在由三氟乙酰胺制备N -Boc化合物的过程中,鉴定出竞争分子内重排导致新的N-(恶唑-5-基)-2,2,2-三氟乙亚氨酸酯,其程度主要取决于对以下化合物的选择:反应条件。