报道了一种合成保护的α-氨基酸的通用有效策略。该方法以丙二酸酯衍生物为起始原料,以Cs 2 CO 3为碱在60度下,通过释放CO 2,以中等收率得到α-氨基酸衍生物。该方法学显示了广泛的底物范围(伯酸和仲酸),出色的官能团耐受性和高效率,可在温和的反应条件下提供所需的产物。它还允许构建β和γ-氨基酸以及其他非天然产物。
Enantiomeric Resolution of α-Amino Acid Derivatives on Two Diastereomeric Chiral Stationary Phases Based on Chiral Crown Ethers Incorporating Two Different Chiral Units
Two diastereomeric chiralstationaryphases (CSPs) were applied to the liquid chromatographic resolution of various racemic α-amino methyl esters, α-amino N,N-diethylamides and α-amino N-propylamides. The CSP incorporating (R)-3,3'-diphenyl-1,1'-binaphtyl and (R,R)-tartaric acid unit as chiral barriers did not show any chiral recognition. In contrast, the CSP incorporating (R)-3,3'-diphenyl-1,1'-binaphtyl