作者:Dana Ferraris、Brandon Young、Travis Dudding、William J. Drury、Thomas Lectka
DOI:10.1016/s0040-4020(99)00450-0
日期:1999.7
We report the first examples of catalytic, enantioselective alkylation of N,O-acetals to produce useful amino acid derivatives 5 in high yield (73–93%) and enantioselectivity (70–96%). We have extended the utility of our reaction to include a simple one-pot procedure from readily available starting materials. We also provide several different N-based protecting groups that greatly increase the flexibility
我们报道了N,O-乙缩醛催化,对映选择性烷基化以高产率(73-93%)和对映选择性(70-96%)产生有用的氨基酸衍生物5的第一个例子。我们将反应的效用范围扩展到了从容易获得的起始原料开始的简单一锅法。我们还提供了几种不同的基于N的保护基,可大大提高反应的灵活性。此外,我们已经阐明了新的机理信息,包括发现了独特的转氨反应,该反应从烯醇硅烷亲核试剂与N,O-缩醛的催化反应开始。这些细节将指导我们进一步探索反应的范围和效用。