Asymmetric metal-free synthesis of fluoroquinolones by organocatalytic hydrogenation
作者:Magnus Rueping、Mirjam Stoeckel、Erli Sugiono、Thomas Theissmann
DOI:10.1016/j.tet.2010.04.091
日期:2010.8
A highly enantioselective organocatalytic transfer hydrogenation enabling the synthesis of both 6-fluoro-2-methyltetrahydroquinoline and 7,8-difluoro-3-methyl-benzoxazine has been developed. These key building blocks can for the first time be synthesized using the same methodology allowing fast and efficient, metal-free access to the antibiotic fluoroquinolones flumequine and levofloxacine. (C) 2010 Elsevier Ltd. All rights reserved.