Palladium-catalyzed intramolecular dearomative reductive-Heck reaction of C2-substituted indoles is developed, which provides access to structurally diverse 3,2′-spiropyrrolidine oxindoles. By changing the hydride source to AcONa base, direct C3-arylation products [2,3-b]quinolinones are achieved in good yields. The reaction of C2-substituted benzofuran is also realized, delivering the desired spiro-product
开发了钯催化的C2取代的吲哚分子内脱芳香性还原-Heck反应,该反应可提供结构上不同的3,2'-螺吡咯烷氧吲哚。通过将氢化物来源更改为AcONa碱,可以得到高产率的直接C3-芳基化产物[2,3- b ]喹啉酮。还实现了C 2-取代的苯并呋喃的反应,提供了所需的螺产物。
Intramolecular Pd-Catalyzed Anomeric C(sp<sup>3</sup>)–H Activation of Glycosyl Carboxamides
An expedient method for the synthesis of fused glycosylquinolin-2-ones and glycosylspirooxindoles through an unprecedented intramolecularPd-catalyzed anomeric C–H activation of the sugar moiety of 2-bromophenyl glycosylcarboxamides is reported. The scope of the reaction is broad and tolerates a wide range of functional groups.