Asymmetric Trienamine Catalysis for the Construction of Structurally Rigid Cyclic α,α-Disubstituted Amino Acid Derivatives
作者:Hao Jiang、Björn Gschwend、Łukasz Albrecht、Signe Grann Hansen、Karl Anker Jørgensen
DOI:10.1002/chem.201101539
日期:2011.8.8
stereoselective Diels–Alder reactions with olefinic azlactones by asymmetric trienamine catalysis. The obtained cycloadducts are easily transformed into the corresponding cyclic α,α‐disubstituted N‐protected amino acid methyl esters under mild reaction conditions. Furthermore, it is demonstrated that in situ ligation of the crude cycloaddition products with amino acid hydrochloride salts leads to the
通过不对称的三烯胺催化,显示2,4-二烯醛与烯烃氮杂内酯发生高度立体选择性的狄尔斯-阿尔德反应。在温和的反应条件下,将获得的环加合物轻松转化为相应的环状α,α-二取代的N-保护的氨基酸甲基酯。此外,已证明粗制环加成产物与氨基酸盐酸盐的原位连接导致以单罐方式形成非天然二肽基序。