β-Lactams in synthesis: short syntheses of cobactin analogs
作者:Andrew J. Walz、Marvin J. Miller
DOI:10.1016/j.tetlet.2007.05.085
日期:2007.7
Mycobactins facilitate assimilation of iron by mycobacteria. Synthetic analogs with structural variation of the cobactin component have potent anti-TB activity. A new method for the synthesis of cobactin analogs is presented. The key process involves single-step coupling reactions between an amine of a cyclic (l)-lysine derived hydroxamic acid with cyanide activated β-lactams.
A useful diastereoselectivesynthesis of aldolsusingchiral 3-acyl-1,3-oxazlidine-2-thiones, (1), (4), (7), and (9), is reported and its application to the synthesis of a chiral azetidinone (11) is described.