<i>N</i>
‐Alkylation of α‐Amino Esters and Amides through Hydrogen Borrowing
作者:Charlotte E. Coomber、Louis J. Diorazio
DOI:10.1002/ejoc.202200152
日期:2022.8.26
A method for the iridium catalysed direct alkylation of amino esters and amides using alcohols, which can utilise both the free base and HCl salts of the amine, was developed. This reaction proceeds through a borrowing hydrogen borrowing mechanism.
Asymmetric [1,2] Stevens Rearrangement of (<i>S</i>)-<i>N</i>-Benzylic Proline-derived Ammonium Salts under Biphasic Conditions
作者:Eiji Tayama、Shintaro Nanbara、Takeshi Nakai
DOI:10.1246/cl.2006.478
日期:2006.5
The Stevensrearrangement of (S)-N-benzylic proline-derived ammonium salt with cesium hydroxide in 1,2-dichloroethane is shown to proceed with a high degree of the N-to-C chirality transmission to afford the α-substituted proline derivatives in high enantio-purities.
(S)-N-苄基脯氨酸衍生的铵盐与氢氧化铯在 1,2-二氯乙烷中的 Stevens 重排显示出以高度的 N 到 C 手性传递进行以提供 α-取代的脯氨酸衍生物在高对映纯度。