An easy access to styrenes: trans aryl 1,3-, 1,4- and 1,5-dienes, and 1,3,5-trienes by Hiyama cross-coupling catalyzed by palladium nanoparticles
作者:Tanmay Chatterjee、Raju Dey、Brindaban C. Ranu
DOI:10.1039/c0nj01019g
日期:——
A convenient and efficient procedure has been developed for the vinylation of aryl-, styrenyl-, cinnamyl- and dienyl-halides by a Pd(0) nanoparticle-catalyzed Hiyama cross-coupling to provide the corresponding dienes and trienes in high yields. The reaction does not require any ligand or co-catalyst, and is carried out using PdCl2 and tetrabutyl ammonium fluoride (TBAF) in THF. Pd nanoparticles are generated in situ and are the active catalytic species in this reaction. A wide range of functionalized styrenes, trans aryl 1,3-, 1,4- and 1,5- dienes, 1,2-, 1-3 and 1,4-bis(1,3-dienes), and 1,3,5-trienes can be obtained by this procedure.
开发了一种便捷高效的方法,通过Pd(0)纳米颗粒催化的Hiyama交叉耦合反应,实现了芳基、苯乙烯基、肉桂基和二烯基卤化物的乙烯化反应,以高产率得到相应的二烯和三烯。该反应无需任何配体或共催化剂,只需使用PdCl2和四丁基氟化铵(TBAF)在THF中进行。Pd纳米颗粒在反应中原位生成,是该反应的活性催化物种。利用这一方法,可以合成多种功能化的苯乙烯、反式芳基1,3-、1,4-和1,5-二烯、1,2-、1,3-和1,4-双(1,3-二烯),以及1,3,5-三烯。