Studies on lactams. Part 65. N-Unsubstituted .beta.-lactams from .beta.-hydroxy-.alpha.-amino acids. Facile preparation of intermediates for isocephalosporins
Enantiospecific synthesis of β-lactams via cycloaddition
作者:Ajay K. Bose、M.S. Manhas、J.M. van der Veen、S.S. Bari、D.R. Wagle、V.R. Hegde、Lalitha Krishnan
DOI:10.1016/s0040-4039(00)98458-2
日期:1985.1
substituted cis-β-lactams can be achieved by the annelation of Schiff bases from optically active ketal aldehydes derived from D-threonine. Similar annelation of Schiff bases from the triphenylsilyl ether of D-threonine ester and cinnamaldehyde leads to cis-β-lactams with high diastereofacialselectivity.