Palladium-Catalyzed Heteroannulation of 1,3-Dienes To Form α-Alkylidene-γ-butyrolactones
作者:Steve V. Gagnier、Richard C. Larock
DOI:10.1021/jo991692g
日期:2000.3.1
by the palladium-catalyzed heteroannulation of a variety of 1,3-dienes by alpha-iodo and alpha-bromo acrylic acids. The best results are obtained by employing a catalytic amount of the sterically hindered chelating alkyl phosphine D-t-BPF [(di-tert-butylphosphino)ferrocene]. In most cases, this process is highly regioselective. The reaction is believed to proceed via (1) oxidative addition of the vinylic