Stereoselective Synthesis of 3-Hydroxyproline Benzyl Esters from <i>N</i>-Protected β-Aminoaldehydes and Benzyl Diazoacetate
作者:Steven R. Angle、Dominique S. Belanger
DOI:10.1021/jo030360f
日期:2004.6.1
benzyl esters from α-alkyl and α-alkoxy N-protected aminoaldehydes with benzyl diazoacetate is described. Aldehydes with α-alkyl substituents afforded prolines as a single diastereomer with a trans-cis relative configuration in 14−77%. An α-tert-butyldimethylsilyloxy aminoaldehyde afforded a proline as a single diastereomer with a trans-trans relative configuration in 37% yield.
描述了由α-烷基和α-烷氧基N-保护的氨基醛与重氮苄基乙酸酯合成一系列3-羟基脯氨酸苄基酯。具有α-烷基取代基的醛提供脯氨酸作为单一非对映异构体,反式-顺式相对构型为14-77%。α-叔丁基二甲基甲硅烷氧基氨基醛以37%的收率提供脯氨酸作为具有反式-反式相对构型的单一非对映异构体。