The efficient one-pot synthesis of tetraalkyl substituted furans from symmetrical acetylenes, EtAlCl2, and carboxylic esters catalyzed by Cp2TiCl2
作者:Mariya G. Shaibakova、Leila O. Khafizova、Nuri M. Chobanov、Rinat R. Gubaidullin、Natal’ya R. Popod’ko、Usein M. Dzhemilev
DOI:10.1016/j.tetlet.2014.01.015
日期:2014.2
A new one-pot method for the synthesis of tetraalkyl substituted furans in 74–80% yields has been implemented via the reaction between symmetrical acetylenes, ethylaluminum dichloride, and carboxylic esters in the presence of metallic Mg as an acceptor of halide ions, catalyzed by bis(cyclopentadienyl)titanium dichloride. A mechanism for the reaction is proposed and discussed.
在金属镁作为卤离子受主的条件下,通过对称乙炔,二氯化乙基铝和羧酸酯之间的反应,已经实现了一种新的一锅法合成四烷基取代的呋喃,产率为74-80%。双(环戊二烯基)二氯化钛。提出并讨论了反应机理。