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
Enantioselective Synthesis of <i>anti</i>-β-Substituted γ,δ-Unsaturated Amino Acids: A Highly Selective Asymmetric Thio-Claisen Rearrangement
作者:Zhihua Liu、Hongchang Qu、Xuyuan Gu、Byoung J. Min、Joel Nyberg、Victor J. Hruby
DOI:10.1021/ol801657q
日期:2008.9.18
novel synthesis of optically active anti-beta-substituted gamma,delta-unsaturated amino acids via a thio-Claisenrearrangement has been achieved. A 2,5-diphenylpyrrolidine was used as a C2-symmetric chiral auxiliary to control the stereochemistry, giving good yields and excellent diastereoselectivities and enantioselectivities.