Asymmetric organocatalytic nitroaldol reaction of α-ketoesters: stereoselective construction of chiral tertiary alcohols at subzero temperature
作者:Keisuke Takada、Nobuko Takemura、Kaori Cho、Yoshihiro Sohtome、Kazuo Nagasawa
DOI:10.1016/j.tetlet.2008.01.030
日期:2008.3
Asymmetric nitroaldol reaction of α-ketoesters was explored using a guanidine–thiourea bifunctional organocatalyst at temperatures below the freezing point of water. The new reaction protocol can be applied to the nitroaldol reaction of nitroalkanes and α-ketoesters to construct the adjacent stereocenters of the chiral tertiary alcohol product with high diastereo- and enantioselectivity.
在低于水的冰点的温度下,使用胍-硫脲双功能有机催化剂探索了α-酮酸酯的不对称硝基羟醛反应。该新的反应方案可以应用于硝基烷烃和α-酮酸酯的硝基醇醛反应,以构建具有高非对映和对映选择性的手性叔醇产物的相邻立体中心。