Engineering Acyclic Stereocontrol in the Alkylation of Vinylglycine-Derived Dianions: Asymmetric Synthesis of Higher α-Vinyl Amino Acids
作者:David B. Berkowitz、Jill M. McFadden、Marianne K. Sloss
DOI:10.1021/jo9918091
日期:2000.5.1
auxiliary may be recovered in high yield (generally 90%) using a modification of Gassman's "anhydrous hydroxide" conditions, in which considerably higher temperatures are employed. Among the sidechains introduced directly are those of butyrine, leucine, ornithine, phenylalanine, aspartate, valine, and norvaline. The lysine sidechain is elaborated via a 4-step sequence from the alkylation product obtained