Enantioselective synthesis of β-amino alcohols and α-amino acids via a copper catalyzed addition of diorganozinc reagents to N-phosphinoylimines
作者:Jean-Nicolas Desrosiers、Alexandre Côté、André B. Charette
DOI:10.1016/j.tet.2005.03.113
日期:2005.6
Enantioenriched β-amino alcohols were prepared via an asymmetric addition of diethylzinc, catalyzed by the BozPHOS·Cu(I) complex, on in situ formed N-phosphinoylimines. The nature of the hydroxyl protecting groups was found to affect the enantioselectivities. Subsequent deprotection and oxidation of N-phosphinoyl β-amino alcohols afforded optically active α-amino acids (97% ee).
通过在BosPHOS·Cu(I)络合物的催化下,在原位形成的N-膦基嘧啶上不对称地添加二乙基锌,可制得对映体富集的β-氨基醇。发现羟基保护基的性质影响对映选择性。随后对N-膦酰基β-氨基醇进行脱保护和氧化,得到旋光性α-氨基酸(97%ee)。