The First Syntheses of the 1-Oxo-2-oxa-5-azaspiro[3.4]octane Ring System Found in Oxazolomycin
作者:Julien P. N. Papillon、Richard J. K. Taylor
DOI:10.1021/ol0058792
日期:2000.7.1
[reaction: see text] L-Proline was utilized to prepare an optically active 1-oxo-2-oxa-5-azaspiro[3.4]octane for the first time. The synthesis of the racemic system, using a tandem aldol-lactonization reaction, is also described. Ruthenium tetroxide oxidation of these compounds afforded the corresponding spiro beta-lactone gamma-lactams.