Thio-Claisen Rearrangement Used in Preparing Anti-β-Functionalized γ,δ-Unsaturated Amino Acids: Scope and Limitations
作者:Zhihua Liu、Sukeshi J. Mehta、Kwang-Soo Lee、Bryan Grossman、Hongchang Qu、Xuyuan Gu、Gary S. Nichol、Victor J. Hruby
DOI:10.1021/jo201753q
日期:2012.2.3
of our most recent study using the thio-Claisen rearrangement for the synthesis of anti-β-functionalized γ,δ-unsaturated amino acids. Investigations on scope, limitations, chemoselectivities and stereoselectivities regarding an FeBr3-catalyzed allylation strategy and a thio-enolate dianion formation strategy for asymmetric thio-Claisen rearrangement are documented. An explanation of the chirality crossover
多功能化氨基酸,尤其是不饱和氨基酸,是肽化学中重要的、要求苛刻的构建模块。在这里,我们总结了我们最近使用硫代-克莱森重排合成抗 β 功能化 γ,δ-不饱和氨基酸的研究。记录了关于 FeBr 3催化烯丙基化策略和不对称硫代-克莱森重排的硫代烯醇二价阴离子形成策略的范围、局限性、化学选择性和立体选择性的研究。提出了对 Eschenmoser-Claisen 重排和 thio-Claisen 重排之间观察到的手性交叉的解释。新型光学活性N α首次制备了具有生物学意义的官能团的保护氨基酸。