Fused bicyclic systems through a ni-mediated intermolecular cyclopentenone annulation
作者:Francisco Camps、Amadeu Llebaria、Josep M. Moretó、Lluís Pagès
DOI:10.1016/s0040-4039(00)77686-6
日期:1992.1
The extension of the Ni(CO)4 promoted carbonylative cycloaddition of acetylenes and allyl halides to the 5–8 membered 3-halocycloolefins leads efficiently to the formation of the corresponding 4–5 fused 2-cyclopentenones with high regio and stereoselectivities.
Ring-fused and spiro cyclopentenones by Ni(CO)4-promoted intermolecular carbonylative cycloaddition of acetylenes with 3-halo- and 1-(halomethyl)cycloalkenes
作者:Lluis Pages、Amadeu Llebaria、Francisco Camps、Elies Molins、Carles Miravitlles、Josep M. Moreto
DOI:10.1021/ja00052a047
日期:1992.12
The title carbonylativecycloaddition of five- to eight-member ring 3-halo- and 1-(halomethyl)cycloalkenes with different acetylenes was studied. From moderate to good yields of ring-fused and spiro cyclopentenone derivatives were obtained, especially in the reaction with acctylenes bearing electron-withdrawing substituents by propa selection of the reaction conditions to avoid the acetylene polyinsertion