作者:Thomas Werner、Abdol Riahi、Heiko Schramm
DOI:10.1055/s-0030-1260230
日期:2011.11
The addition of diethylzinc to aromatic, heteroaromatic, and aliphatic aldehydes at room temperature is efficiently catalyzed by 1-7 mol% tetrabutylphosphonium chloride. The corresponding addition products are obtained in good to excellent yields of up to 99%. Moreover, polymer bond phosphonium salts can be used to catalyze this reaction with excellent recovery of the polymer bond catalyst up to three
在室温下,将二乙基锌加到芳族,杂芳族和脂族醛中可有效地由1-7 mol%的氯化四丁基phosph催化。可以以高达99%的优良率获得相应的加成产物。而且,聚合物键合salts盐可用于催化该反应,并且聚合物键合催化剂的优良回收率高达三个循环。手性双官能phospho盐的应用显示出显着的抗阴离子作用。改变阴离子,四丁基鏻的盐的活性的顺序降低氯- >溴- >我- ≈TSO - > BF 4 - ≈PF 6 -。但是,阳离子的性质也有重大影响。与氯化phospho相比,氯化四烷基铵的活性相似,而碱金属氯化物的活性却大大降低。 催化-phospho盐-加成-二乙基锌-醛