Stereoselective Synthesis of β-Benzyl-α-alkyl-β-amino Acids from <scp>l</scp>-Aspartic Acid<sup>1</sup>
作者:Masahiko Seki、Toshiaki Shimizu、Kazuo Matsumoto
DOI:10.1021/jo991241w
日期:2000.3.1
benzene or phenyllithium with alpha-amino carboxyl group of L-aspartic acid skeleton. Alkylation of a dianion of 4 with alkyl halides and subsequent hydrogenation afforded anti-disubstituted beta-amino acids 1b and 1c in high stereoselectivities. Complete reversal of the stereoselection was realized by the alkylation of 4-phenyl-3-tert-butoxycarbonylamino-4-butanolide 6 which was obtained in a single
An efficient synthesis of γ-aryl or alkyl substituted β-aminoacids starting from N-Cbz-L-homoserine lactone via the formation of α-amino aryl, alkenyl or alkynyl ketones with the original α-carbon chirality retained as such is described.