DIETHYL ETHYNYLPHOSPHONATE: A VERSATILE SYNTHON FOR THE PREPARATION OF 1-ALKYNYL- AND 1,3-BUTADIY NE-1,4-DIYLPHOSPHONATES
作者:Sylvain G. Dutremez、Christian Guerin、Bernard J.L. Henner、Veronique Tomberli
DOI:10.1080/10426500008043685
日期:2000.5.1
responsible for these low yields. Metalation of 1 with EtMgBr and t-BuLi has been carried out and the M-C≡C-P(O)(OEt)2 (M = MgBr, Li) derivatives have been characterized via reaction with Me3SiCl or Ph3iCl. The easy access to the organolithium compound has made possible the synthesis of the zinc analog (M = ZnCl) which reacts with aromatic iodides (C6H5I, p-MeOC6H41, p-O2NC6H4I, p-1C6H4I, 2-iodothiophene), in
摘要 乙炔基膦酸二乙酯 (1) 与几种芳香族碘化物在 Sonogashira 条件下 (Cl2Pd(PPh3)2/CuI/Et3N) 之间的交叉偶联反应仅产生微量的预期 1-炔基膦酸酯。使用 Pd(OAc)2/2PPh3/Et3N 代替之前的催化体系后,产率约为 20%。涉及 1 和矿山的副反应被证明是造成这些低产量的原因。已经进行了 1 与 EtMgBr 和 t-BuLi 的金属化,并且 MC≡CP(O)(OEt)2 (M = MgBr, Li) 衍生物已通过与 Me3SiCl 或 Ph3iCl 的反应进行表征。容易获得有机锂化合物使得锌类似物(M = ZnCl)与芳香碘化物(C6H5I、p-MeOC6H41、p-O2NC6H4I、p-1C6H4I、2-碘噻吩)的合成成为可能。 Pd(PPh3)4, 以合理的产率得到 1-炔基膦酸二乙酯。1 在 Hay 条件下(CuCl/TMEDA:丙酮