Efficient Construction of Fused Indolines with a 2-Quaternary Center via an Intramolecular Heck Reaction with a Low Catalyst Loading
摘要:
An efficient construction of fused indolines with a 2-quaternary center through a palladium-catalyzed intramolecular Heck reaction of N-(2(2-halobenzoxyl)-2,3-disubstituted indoles is disclosed. This protocol provided a straightforward access to diverse fused indolines with good functional group tolerance.
A palladium-catalyzed domino Larock annulation/dearomative Heckreaction is developed, which delivers a range of tetracyclic indoline derivatives in moderate to excellent yields through a Larock annulation of N-bromobenzoyl o-iodoanilines with alkynes and a subsequent intramolecular dearomative Heckreaction. This protocol provides a straightforward route to structurally diverse indolines from readily