A novel and efficient synthesis of 3-carboxy-4-oxo-1,8-naphthyridines using magnesium chloride
摘要:
A novel and efficient synthesis of 5-oxo-6-carboxy-naphthyridines is reported in this Letter along with a discussion of scope and limitations. Activated 3-nicotinic acids readily acylate the magnesium anion of 2-(benzothiazol-2-yl) or 2-(benzimidazol-2-yl) acetates. The corresponding product can then undergo cyclization spontaneously or under very mild conditions to give the desired naphthyridine products. Only near stoichiometric ratios of reactants are required for this approach and the products are isolated in pure form after a trituration making this an efficient process. (c) 2008 Elsevier Ltd. All rights reserved.
The present invention provides novel quinolone compounds and pharmaceutical composition thereof which may inhibit cell proliferation and/or induce cell apoptosis. The present invention also provides methods of preparing such compounds and compositions, and methods of making and using the same.
A novel and efficient synthesis of 3-carboxy-4-oxo-1,8-naphthyridines using magnesium chloride
作者:Peter C. Chua、Johnny Y. Nagasawa、Fabrice Pierre、Michael K. Schwaebe、Anne Vialettes、Jeffrey P. Whitten
DOI:10.1016/j.tetlet.2008.05.005
日期:2008.7
A novel and efficient synthesis of 5-oxo-6-carboxy-naphthyridines is reported in this Letter along with a discussion of scope and limitations. Activated 3-nicotinic acids readily acylate the magnesium anion of 2-(benzothiazol-2-yl) or 2-(benzimidazol-2-yl) acetates. The corresponding product can then undergo cyclization spontaneously or under very mild conditions to give the desired naphthyridine products. Only near stoichiometric ratios of reactants are required for this approach and the products are isolated in pure form after a trituration making this an efficient process. (c) 2008 Elsevier Ltd. All rights reserved.