beta-amino acids;
dihydroxylation;
ring opening;
ring closure;
enzymatic resolution;
INFLUENZA NEURAMINIDASE INHIBITORS;
SATURATED HETEROCYCLES;
RING ANALOGS;
ACIDS;
ENANTIOPURE;
PEPTIDES;
PROLINE;
(+)-ANATOXIN-A;
OLIGOMERS;
CHEMISTRY;
D O I:
10.3998/ark.5550190.0011.904
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
Novel azabicyclic beta-amino acid derivatives were readily prepared from diexo or diendo norbornene beta-amino acids. The 3-azabicyclo[3.2.1]octane skeleton was obtained by NaIO4-mediated cleavage of the dihydroxylated beta-amino ester intermediates, followed by reductive amination. Lipase-catalyzed enantioselective ring opening of racemic exo-norbornene beta-lactam allowed preparation of the corresponding azabicyclic exo beta-amino acid in enantiopure form.