The first example of asymmetric induction in an anionic amino-Cope rearrangement
作者:Steven M. Allin、Martin A.C. Button
DOI:10.1016/s0040-4039(98)00487-0
日期:1998.5
The anionic amino-Cope rearrangement of suitably functionalized acyclic 3-amino-1,5-diene substrates has been achieved and we report the first example of an asymmetric anionic amino-Cope rearrangement to yield an enantiomerically enriched product (75% e.e.). The absolute stereochemistry of the products has been verified and transition state models are proposed to rationalize the stereochemical outcome
A General Organocatalytic System for Enantioselective Radical Conjugate Additions to Enals
作者:Emilien Le Saux、Dengke Ma、Pablo Bonilla、Catherine M. Holden、Danilo Lustosa、Paolo Melchiorre
DOI:10.1002/anie.202014876
日期:2021.3
enantioselective conjugate addition of carbon‐centered radicals to aliphatic and aromatic enals. The process uses an organic photoredox catalyst, which absorbs blue light to generate radicalsfrom stable precursors, in combination with a chiral amine catalyst, which secures a consistently high level of stereoselectivity. The generality of this catalytic platform is demonstrated by the stereoselective interception
Applications of the amino-Cope rearrangement: synthesis of tetrahydropyran, δ-lactone and piperidine targets
作者:Steven M. Allin、Munira Essat、Catarina Horro Pita、Robert D. Baird、Vickie McKee、Mark Elsegood、Mark Edgar、David M. Andrews、Pritom Shah、Ian Aspinall
DOI:10.1039/b416179c
日期:——
We report a novel approach to some chiral tetrahydropyran and delta-lactone targets that utilizes the asymmetric amino-Cope rearrangement as a key synthetic step. Products of amino-Cope rearrangement chemistry have also been applied to access piperidine targets, further demonstrating the potential of the methodology.
Metalated chiral allylamines of type 2 (M = Li, K) are used as chiral homoenolate equivalents and allow after alkylation and acidic hydrolysis asymmetric CC bond formations to β-substituted aldehydes in enantiomeric excesses up to 67%.