Palladium-catalysed annulative allylic alkylation for the synthesis of benzannulated heteroarenes
作者:Sonu Yadav、S. S. V. Ramasastry
DOI:10.1039/d0cc06695h
日期:——
A conceptually novel intramolecular allylic alkylation strategy is developed for the synthesis of carbazoles and dibenzothiophenes. In an unusual event, palladium catalyses the formation of π-allylpalladiumcomplexes of the respective (2-methylindol-3-yl)allyl acetates and subsequently facilitates the benzannulation process.
One-Pot Relay Gold(I) and Brønsted Acid Catalysis: Cyclopenta[<i>b</i>]annulation of Indoles via Hydroamination/Nazarov-Type Cyclization Cascade of Enynols
作者:Seema Dhiman、S. S. V. Ramasastry
DOI:10.1021/acs.orglett.5b02632
日期:2015.10.16
An expedient relay gold(I) and Bronsted acid catalyzed hydroamination/Nazarov cyclization of 1-(2-aminophenyl)pent-4-en-2-ynols for the synthesis of various polyfunctionalized cyclopenta[b]indoles is described. The synthetic utility of this method has been demonstrated by the synthesis of a few unprecedented pentacyclic indoles and indole steroidal hybrids. Further, the new methodology has been successfully applied to the enantioselective synthesis of core carbon structure of the polyveoline family of natural products.