Palladium-catalysed cyclisation–amination of allenes-effect of base on regioselectivity of formation of allylic amines
作者:Ronald Grigg、Visuvanathar Sridharan、Long-He Xu
DOI:10.1039/c39950001903
日期:——
The palladium catalysed cyclisation of aryl iodides onto proximal allenes occurs at the centre carbon atom of the allene forming a five- or six-membered rings and generating a Ï-allyl intermediate. The regiochemistry of attack of secondary amines on the Ï-allyl intermediate is sensitive to added inorganic base, steric effects and the nature of the adjacent heteroatom.
作者:Ronald Grigg、Rukhsana Rasul、James Redpath、David Wilson
DOI:10.1016/0040-4039(96)00889-1
日期:1996.6
An additional starter species [allenylpalladium(II)] has been implemented for palladiumcatalysedcascade cyclisation-anion capture processes. Good yields of bis-cyclisation-anion products involving anionic (NaBPh4), neutral () and organometallic (Bu3SnR) capture agents are reported.