EtAlCl<sub>2</sub>/2,6-Disubstituted Pyridine-Mediated Carboxylation of Alkenes with Carbon Dioxide
作者:Shinya Tanaka、Kota Watanabe、Yuuki Tanaka、Tetsutaro Hattori
DOI:10.1021/acs.orglett.6b00918
日期:2016.6.3
and trialkyl-substituted alkenes undergo carboxylation with CO2 in the presence of EtAlCl2 and 2,6-dibromopyridine to afford the corresponding α,β- and/or β,γ-unsaturated carboxylic acids. This reaction is suggested to proceed via the electrophilic substitution of EtAlCl2 with the aid of the base, followed by the carbonation of the resulting ate complex. This reaction can be applied to terminal dialkylalkenes
在EtAlCl 2和2,6-二溴吡啶的存在下,α-芳基烯烃和三烷基取代的烯烃与CO 2进行羧化反应,得到相应的α,β-和/或β,γ-不饱和羧酸。建议该反应通过在碱的辅助下对EtAlCl 2进行亲电取代,然后将所得的盐配合物碳酸化来进行。通过使用2,6-二叔丁基吡啶和2,6-二溴吡啶的混合物,该反应可用于末端二烷基烯烃。