Eleven aromatic and aliphatic aldehydes have been alkylated with Et2Zn in the presence of the homoannularly bridged hydroxyamino ferrocene I. The resulting carbinols have e.e's varying from 66 to 97%. A mechanistic approach is presented to rationalize the preferred formation of the enantiomer observed.
在同环桥联的羟
氨基二茂铁I的存在下,已经用Et 2 Zn烷基化了11个芳香族和脂肪族醛。所得
甲醇的ee值从66%到97%不等。提出了一种机械方法来合理化所观察到的对映异构体的优选形式。