Catalytic Enantioselective Claisen Rearrangements of O-Allyl β-Ketoesters
作者:Christopher Uyeda、Andreas R. Rötheli、Eric N. Jacobsen
DOI:10.1002/anie.201005183
日期:2010.12.10
A chiral guanidinium ion is shown to catalyze enantioselective Claisenrearrangements of O‐allyl β‐ketoesters in 78–87 % ee (see scheme). The pericyclic nature of the process allows products containing vicinal stereogenic centers to be accessed with both enantio‐ and diastereocontrol.
手性胍离子在 78-87% ee 中催化O-烯丙基 β-酮酯的对映选择性克莱森重排(见方案)。该过程的周环性质允许通过对映和非对映控制访问含有邻位立体中心的产品。
Enantioselective Synthesis of [
<i>b</i>
]‐Annulated Azepane Scaffolds
作者:Enno Aeissen、Aaron R. von Seggern、Marc Schmidtmann、Jens Christoffers
DOI:10.1002/ejoc.202300180
日期:——
Optically active α-allyl-β-oxoesters are submitted to olefin cross metathesis and subsequent exhaustive hydrogenation and reductive amination to furnish [b]-annulated azepane derivatives.
光学活性 α-烯丙基-β-氧代酯经过烯烃交叉复分解和随后的彻底氢化和还原胺化以提供 [ b ]-环氮杂环庚烷衍生物。