Palladium(II)-Catalyzed Direct Alkenylation of Nonaromatic Enamides
作者:Nicolas Gigant、Isabelle Gillaizeau
DOI:10.1021/ol301249n
日期:2012.7.6
A mild and efficient method for the direct alkenylation of nonaromatic enamides was achieved through a palladium(II)-catalyzed C-H funclionalization. The reaction scope includes cyclic and acyclic enamides and a range of activated alkenes. This approach represents the first successful direct C(3)-functionalization of nonaromatic cyclic enamides.
Direct alkenylation of non-aromatic enamides via palladium-catalyzed oxidative coupling: Synthetic developments and applications
Résumés Anglais Français Direct C(3) alkenylation of non-aromatic enamides through palladium(II)-catalyzed Fujiwara–Moritani cross-coupling was developed. The reaction scope includes a range of cyclic enamides as well as activated alkenes. The utility of this methodology is illustrated by the synthesis of octa- or tetrahydroquinoline cores obtained from conjugated enamides via Diels–Alder cycloaddition. L’alcénylation directe en C(3) d’énamides non aromatiques a été développée selon le couplage croisé catalysé par le palladium(II) décrit par Fujiwara–Moritani. Le potentiel de cette réaction s’étend sur une large gamme d’énamides cycliques ainsi que différents alcènes activés. L’intérêt de cette méthodologie est illustrée par la synthèse de noyaux octa- ou tétrahydroquinoléine via une réaction de cycloaddition de Diels–Alder à partir d’énamides conjugués précédemment obtenus.
The intermolecular rhodium(II)‐catalyzed C(sp3)–H amination of enamides gives access to new 4‐aminopiperidine derivatives that are useful building blocks in medicinal chemistry. This efficient transformation proceeds at room temperature with complete regio‐ and chemoselectivity in favor of the allylic C(sp3)–H bond, and has a broad functional group tolerance. In addition, the matched combination of
分子间的铑(II)催化的酰胺的C(sp 3)-H胺化作用使人们能够获得新的4-氨基哌啶衍生物,这些衍生物在药物化学中是有用的。这种有效的转变在室温下进行,具有完全的区域选择性和化学选择性,有利于烯丙基C(sp 3)–H键,并且具有宽泛的官能团耐受性。此外,手性配合物Rh 2(S- nta)4 [ nta =(S)-N -1,8-萘甲丙氨酸]与光学纯的(S)-磺酰亚胺酰胺的匹配组合可分离出具有优异性能的烯丙基胺。立体声控制。