Synthesis of a Nine-Membered Ring via the Intramolecular Ni(II)/Cr(II)-Mediated Coupling Reaction. Unusual Effect of Concentration on the Course of the Reaction
作者:Keith R. Buszek、Youngmee Jeong
DOI:10.1080/00397919408010554
日期:1994.9
Abstract The first synthesis of a nine-membered ring by means of an intramolecular Ni(II)/Cr(II)-mediated coupling reaction between an iodoacetylene and an aldehyde is reported. The yield of the reaction is strongly dependent on the substrate concentration, but is independent of both the NiCl2 and CrCl2 concentration at high dilution. The application of this methodology to the synthesis of neocarzinostatin
摘要 首次报道了通过分子内 Ni(II)/Cr(II) 介导的碘乙炔和醛之间的偶联反应合成九元环。反应的产率很大程度上取决于底物浓度,但在高稀释度时与 NiCl2 和 CrCl2 浓度无关。讨论了这种方法在合成新制癌素发色团和其他天然产物中的应用。