From beta-lactams to alpha- and beta-amino acid derived peptides.
The potential of beta-lactams as intermediates for the access to alpha- and beta-amino acid-derived peptides is shortly reviewed, with major focus on the technologies developed in our group. The two general strategies lie, on one side, in the oxidative ring expansion of 3-hydroxy beta-lactams to N-carboxy alpha-amino acid anhydrides or Leuch's anhydrides and subsequent coupling with alpha-amino acid esters and, on the other side, in the nucleophilic ring opening of N-Boc-beta-lactams. Both approaches have been successfully applied to the synthesis of alpha,beta-diamino acid, alpha-amino-beta-hydroxy acid, polyhydroxylated alpha-amino acid, alpha,alpha-disubstituted alpha-amino acid, beta-amino acid, beta-amino-alpha-hydroxy acid and beta,beta-disubstituted beta-amino acid derived peptides. Because of the mild reaction conditions needed for the above transformations and the highly stereoselective procedures employed for the construction of the starting beta-lactam ring, the whole process allows the production of optically pure final products.
Departamento de Química Orgánica, Facultad de Química, Universidad del País Vasco, San Sebastián, Spain. qoppanic@sc.ehu.es
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Palomo
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Aizpurua
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Ganboa
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Oiarbide
D000599:Amino Acids, Diamino / Q000138:chemical synthesis* / Q000737:chemistry; D010455:Peptides / Q000138:chemical synthesis* / Q000737:chemistry; D047090:beta-Lactams / Q000737:chemistry*
D000599:Amino Acids, Diamino; D010455:Peptides; D047090:beta-Lactams