organolithium compounds in the presence of (−)‐sparteine, was revisited and applied to unprecedented acylations with Weinreb amides to access highly enantioenriched α‐oxyketones and cyclic α‐aminoketones. Recycling of the sustainable solvent cyclopentyl methyl ether, sparteine, and the released Weinreb “amine” [HNMe(OMe)] was possible through a simple work‐up procedure that enabled full recovery of these
成熟的 Hoppe-Beak
化学涉及在 (−)-
金雀花碱存在下对映选择性生成
有机锂化合物,该
化学被重新审视并应用于 Weinreb 酰胺的前所未有的酰化反应中,以获得高度对映体富集的 α-氧酮和环状 α-
氨基酮。通过简单的后处理程序可以回收可持续溶剂环
戊基甲基醚、
金雀花和释放的 Weinreb“胺”[HNMe(OMe)],从而完全回收这些珍贵材料。该方法具有强大的范围和灵活性,从而允许对映选择性制备适合进一步衍生化的支架。