A novel ring tansfer reaction of furans to fused furans by tandem intramolecular Diels-Alder reaction and base-catalyzed ring-opening of the adducts has been developed.
作者:HAYAKAWA, KENJI、YAMAGUCHI, YASUCHIKA、KANEMATSU, KEN
DOI:——
日期:——
Construction of three types of fused isoindoles via furan-pyrrole ring exchange reaction
作者:Mase Lee、Hiroyuki Moritomo、Ken Kanematsu
DOI:10.1016/0040-4020(96)00386-9
日期:1996.6
The new synthetic route of threetypes of fusedisoindoles using furan-pyrroleringexchangereaction as the main synthetic strategy is presented. Benzoisoindoles 17, 28 and 38 were synthesised from bicyclic furans 14, 25 and 35 respectively, which were trapped with dimethyl acetylenedicarboxylate.
The furanringtransfer (FRT) reactions of optically active propynyl ethers [(1) and (2)] are described, facile chiralitytransferfrom the cycloadduct to the allylic carbon of the product being observed; the stereochemistry of the product was determined by X-ray analysis.