Asymmetric syn-selective direct aldol reaction of protected hydroxyacetone catalyzed by primary amino acid derived bifunctional organocatalyst in the presence of water
作者:Akshay Kumar、Sarbjit Singh、Vikas Kumar、Swapandeep Singh Chimni
DOI:10.1039/c0ob00898b
日期:——
derived from natural primary amino acids bearing a hydrophobic side chain have been synthesized. These new primary-tertiary diamine-Brønsted acid conjugates bifunctional organocatalysts efficiently catalyzes the asymmetric direct syn selective cross-aldol reaction of different protected hydroxyacetone with various aldehydes in high yield (94%) and high enantioselectivity (up to 97% ee of syn) and dr
合成了一系列新的与水相容的伯叔叔二胺催化剂,该催化剂衍生自带有疏水性侧链的天然伯氨基酸。这些新的伯-叔二胺-布朗斯台德酸结合物的双官能有机催化剂有效地催化不对称直接合成在高产率(94%)和高对映选择性(高达97%ee的各种醛保护不同的羟基丙酮的选择性交叉醛醇缩合反应顺式)和在温和的反应条件下为91:9的dr(syn / anti)。