Ethyl 1,4-dihydro-4-oxo-3-quinolinecarboxylates by a tandem addition-elimination-SNAr reaction
作者:Richard A. Bunce、Eric J. Lee、Matthew T. Grant
DOI:10.1002/jhet.626
日期:2011.5
The ethyl 1,4‐dihydro‐4‐oxo‐3‐quinolinecarboxylate ring structure, important in several drug compounds, has been prepared in two steps from ethyl 2‐(2‐fluorobenzoyl)acetate. Treatment of this β‐ketoester with N,N‐dimethylformamide dimethyl acetal gives a 97% yield of the 2‐dimethylaminomethylene derivative. Reaction of this β‐enaminone with primary amines in N,N‐dimethylformamide at 140°C for 48 h
在几种药物化合物中很重要的1,4-二氢4-氧代-3-喹啉甲酸乙酯环结构是由2-(2-氟代苯甲酰基)乙酸乙酯分两步制备的。用N,N-二甲基甲酰胺二甲基乙缩醛处理这种β-酮酸酯可得到2-二甲基氨基亚甲基衍生物的97%收率。将此β-烯胺酮与伯胺在N,N-二甲基甲酰胺中在140°C下反应48小时,然后串联添加得到1,4-二氢-4-氧代-3-喹啉羧酸酯,收率60-74%。消除-S N Ar反应。介绍了起始材料的综合以及过程详细信息和机制方案。J.杂环化学。(2011)。
Advantageous Use of Ionic Liquids for the Synthesis of Pharmaceutically Relevant Quinolones
The use of ILs instead of DMF in the Grohe cycloaracylation for the synthesis of pharmaceutically relevant quinolones has several advantages. [TBMA][MsO] was the most favourable IL and was used in a one‐pot/three‐step procedure for the preparation of a quinolone acid by a totally green procedure. Our procedure represents an alternative approach to the industrial production of quinolones.
An Efficient Synthesis of N-Alkyl-1,4-Dihydro-4-Oxo-3-Quinolinecarboxylic Acid<i>via</i>2-(2',2',2'-Tri-Chloro)Ethylidene-3-Oxo-3-(2''-Chlorophenyl)Propionate
作者:I. A. Sayyed、D. G. Panse、B. M. Bhawal、A. R. A. S. Deshmukh
DOI:10.1080/00397910008087417
日期:2000.7
A clay catalyzed synthesis of 2-(2',2',2'-trichloro)ethylidene-3-oxo-3-(2"-chlorophenyllpropionate (2) and its application for the preparation of various N-alkyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acids (5a-e) has been described.
GROHE K.; HEITZER H. H., LIEBIGS ANN. CHEM.,(1987) N 1, 29-37