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.
[反应:见正文]首次使用L-脯氨酸制备旋光的1-oxo-2-oxa-5-azaspiro [3.4]辛烷。还描述了使用串联醇醛-内酯化反应的外消旋体系的合成。这些化合物的四氧化钌氧化得到相应的螺β-内酯γ-内酰胺。