Synthesis of Enantiomerically Pure β- and γ-Amino Acids from Aspartic and Glutamic Acid Derivatives
作者:A. El Marini、M. L. Roumestant、Ph. Viallefont、D. Razafindramboa、M. Bonato、M. Follet
DOI:10.1055/s-1992-26315
日期:——
An efficient synthesis of enantiomerically pure β- and γ-amino acids starting from commercially available aspartic and glutamic acid derivatives is described. The acid function, α to the amino group, is first transformed to a good leaving group and the product reacted with organocuprates to yield β-and γ-amino esters. After deprotection β- and γ-amino acids are obtained in good overall yields.
Optically active phenylpyrimidine compounds and liquid crystal compositions containing them
申请人:Chisso Corporation
公开号:EP0313336A2
公开(公告)日:1989-04-26
Optically active liquid crystal compounds useful as components ferroelectric liquid crystal compositions, and Phenylpyrimidine compounds of the formula:
in which R¹ is a C₁-C₁₈ alkyl group of 1 to 18 carbon atoms; n is an integer of from 2 to 15; and C* is an asymmetric carbon atom.