Enantioselective synthesis of 1,2-, 1,3- and 1,4- aminoalcohols by the addition of dialkylzincs to 1,2-, 1,3- and 1,4- aminoaldehydes
作者:Christian Lutz、Volker Lutz、Paul Knochel
DOI:10.1016/s0040-4020(98)00297-x
日期:1998.6
aminoalcohols were prepared by the addition of functionalized dialkylzincs to 1,3-aliphatic and 1,4-unsaturated aminoaldehydes with good to excellent enantioselectivity. Syn- or anti-1,2-aminoalcohols are stereoselectively obtained by asymmetric addition of dialkylzincs to α-aminoaldehydes depending on the choice of the chiral catalyst. A chelate controlled addition is observed if less than stoichiometric
通过向1,3-脂族和1,4-不饱和氨基醛中添加官能化的二烷基锌,制备手性的1,3-和1,4-氨基醇,对映选择性很好。根据手性催化剂的选择,通过不对称地将二烷基锌加成到α-氨基醛上来立体选择性地获得顺-或抗-1,2-氨基醇。如果使用小于化学计量的Ti(O i -Pr)4,则观察到螯合物受控的添加。