Stereoselective construction of a quaternary carbon substituted with multifunctional groups: application to the concise synthesis of (+)-ethosuximide
作者:Tomoaki Abe、Tatsuo Suzuki、Kazuhiko Sekiguchi、Seijiro Hosokawa、Susumu Kobayashi
DOI:10.1016/j.tetlet.2003.10.081
日期:2003.12
Synthetically useful β,γ-unsaturated carbonyl compounds having a quaternary carbon at the α-position were prepared with high stereoselectivity by the reaction of a dienolate anion derived from α,β-unsaturated imide having a chiral auxiliary and electrophiles (ethyl acetate and allyl iodide as the C2 and C3 unit, respectively). This method was applied to a short asymmetric synthesis of (+)-ethosuximide
通过衍生自具有手性助剂的α,β-不饱和酰亚胺的二烯酸根阴离子与亲电子试剂(乙酸乙酯和烯丙基碘)的反应,以高立体选择性制备合成有用的在α-位具有季碳的β,γ-不饱和羰基化合物分别为C 2和C 3单位)。该方法被用于短的不对称合成(+)-ethosuximide。