Lewis Acid Catalyzed Intramolecular Allylic Substitution of Bis(trichloroacetimidates): A Versatile Approach to Racemic Unsaturated Amino Acids
作者:Liene Grigorjeva、Aigars Jirgensons
DOI:10.1002/ejoc.201100060
日期:2011.5
Lewis acid catalyzed cyclization of trichloroacetimidates derived from 1,4-butenediols and 1,5-butenediols was achieved to give 4-vinyl oxazolines and 4-vinyloxazines in good to excellent yields. The cyclization products were transformed to protected unsaturated α- and β-amino acids, thus demonstrating the novel approach to access these important classes of compounds.
路易斯酸催化衍生自 1,4-丁烯二醇和 1,5-丁烯二醇的三氯乙酰亚胺酯的环化反应以良好至极好的产率得到 4-乙烯基恶唑啉和 4-乙烯基恶嗪。环化产物被转化为受保护的不饱和α-和β-氨基酸,从而展示了获取这些重要类别化合物的新方法。