Use of tetrahydropyrimidinium salts for highly efficient palladium-catalyzed cross-coupling reactions of aryl bromides and chlorides
作者:Ismail Özdemir、Serpil Demir、Bekir Çetinkaya
DOI:10.1016/j.tet.2005.06.064
日期:2005.10
synthesized and characterized. These salts, in combination with palladium acetate, provided active catalysts for the cross-coupling of aryl chlorides and bromides under mild conditions. The catalytic system was applied to the Heck, Suzuki and benzaldehyde (Kumada) coupling reactions. Catalyst activity was found to be influenced by the presence of a methoxy group on the ring of the p-position of benzyl substituent
已经合成并表征了新的,空间要求高的1,3-二烷基-3,4,5,6-四氢嘧啶鎓盐(2)。这些盐与乙酸钯结合,为温和条件下芳基氯和溴化物的交叉偶联提供了活性催化剂。该催化体系被用于Heck,Suzuki和苯甲醛(熊田)偶联反应。发现催化剂活性受配体前体的苄基取代基的对位的环上甲氧基的存在的影响。