BF<sub>3</sub>·Et<sub>2</sub>O-Catalyzed Direct Carbon−Carbon Bond Formation of α-EWG Ketene-(<i>S</i>,<i>S</i>)-Acetals and Alcohols and Synthesis of Unsymmetrical Biaryls
作者:Qian Zhang、Shaoguang Sun、Jianglei Hu、Qun Liu、Jing Tan
DOI:10.1021/jo061775e
日期:2007.1.1
efficient BF3·OEt2-catalyzed formal dehydration C−C coupling reaction between readily available α-EWG ketene-(S,S)-acetals and various alcohols via direct substitution of the hydroxy group in alcohols has been developed. On the basis of this C−C coupling reaction, a series of alkylated α-EWG ketene-(S,S)-acetals and functionalized 1,4-pentanedienes were prepared in high to excellent yields and the unsymmetrical
DBSA-catalyzed Friedel–Crafts alkylation of cyclic ketene dithioacetals with alcohols in water
作者:Haifeng Yu、Peiqiu Liao
DOI:10.1016/j.tetlet.2016.05.062
日期:2016.6
A novel DBSA-catalyzed Friedel–Crafts alkylation of cyclic ketene dithioacetals, internal alkenes with highly nucleophilic carbon atom adjacent to the electron-withdrawing group, with alcohols in water has been developed. The reaction is efficient in the presence of catalyst loading as low as 10 mol % in water at reflux, and a wide range of alkylated ketene dithioacetals are synthesized in excellent