Synthesis of conformationally restricted serine derivatives through ruthenium(II)-catalyzed ring closing metathesis
作者:Kristin Hammer、Kjell Undheim
DOI:10.1016/s0040-4020(97)00252-4
日期:1997.4
Stereoselectivesynthesis of α-amino-β-hydroxy acids where the α-carbon of the amino acid is incorporated into a five-, six- or seven-membered ring is described. The stereoselective control at the chiralauxiliary carbon results from stepwise alkenylation and aldol formation using metalated species of the chiralauxiliary (R)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine. Ring closing metathesis was