An amide is formed by reacting an α-ketoacid or salt thereof in a decarboxylative condensation reaction with an amine or salt thereof comprising a nitrogen covalently bound to an atom selected from oxygen, nitrogen, and sulfur. The amide bond is formed between the α-carbon of the ketoacid and the nitrogen of the amine. The α-ketoacid can be formed using a novel sulfur reagent.
An amide is formed by reacting an α-ketoacid or salt thereof in a decarboxylative condensation reaction with an amine or salt thereof comprising a nitrogen covalently bound to an atom selected from oxygen, nitrogen, and sulfur. The amide bond is formed between the α-carbon of the ketoacid and the nitrogen of the amine. The α-ketoacid can be formed using a novel sulfur reagent.
US7737293B2
申请人:——
公开号:US7737293B2
公开(公告)日:2010-06-15
US7667076B2
申请人:——
公开号:US7667076B2
公开(公告)日:2010-02-23
Stereoretentive Synthesis and Chemoselective Amide-Forming Ligations of C-Terminal Peptide α-Ketoacids
作者:Lei Ju、Alexander R. Lippert、Jeffrey W. Bode
DOI:10.1021/ja800053t
日期:2008.4.1
C-Terminal peptide cyanosulfur ylides are readily converted to C-terminal peptide alpha-ketoacids, poised for chemoselective amide-forming reactions with hydroxylamines. These easily prepared and bench stable ylides are quickly and selectively oxidized with aqueous Oxone without the need for protection of most peptide side chains and with minimal epimerization. This approach offers the first method
C 端肽氰硫叶立德很容易转化为 C 端肽 α-酮酸,准备与羟胺进行化学选择性酰胺形成反应。这些易于制备且工作台稳定的叶立德可被 Oxone 水溶液快速且选择性地氧化,无需保护大多数肽侧链,且差向异构化最少。这种方法提供了第一种制备富含对映异构体的侧链未保护α-酮酸的方法。