A high hydroarylation activity of K2PtCl4/AgOTf catalyst in the reaction of propiolic acid with unactivated and activated arenes
作者:Juzo Oyamada、Takuya Hashimoto、Tsugio Kitamura
DOI:10.1016/j.jorganchem.2009.07.008
日期:2009.10
hydroarylation with less reactive benzene to give cis-cinnamic acid in good yield. The hydroarylation with toluene gave a higher yield of hydroarylation products than that with benzene and resulted in ortho/para orientation with an almost statistical ratio, suggesting that the result is very close to that of the Friedel-Crafts alkylation with methyl bromide or p-nitrobenzyl chloride. Hydroarylation of propiolic
在钯和铂催化剂中,混合催化剂K 2 PtCl 4 / AgOTf显示出最高的丙酸加氢芳基化活性。该催化剂可有效地用较少的反应性苯进行加氢芳基化反应,以高收率得到顺式肉桂酸。用甲苯进行氢芳基化反应比使用苯进行氢芳基化反应的收率更高,并导致邻位/对位取向,并且几乎具有统计比例,这表明该结果非常接近于用甲基溴或对硝基苄基进行的Friedel-Crafts烷基化反应的结果。氯化物。在K 2存在下,丙酸与其他富电子芳烃的氢芳基化反应有效进行在三氟乙酸中的PtCl 4 / AgOTf催化剂以良好或高收率形成顺式肉桂酸。该方法也适用于丙酸乙酯的氢芳基化。