391-77-5Relevant articles and documents
Preparation method of 4-chloro-6-fluoroquinoline
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Paragraph 0008; 0024; 0025; 0026; 0027, (2017/08/28)
The invention discloses a preparation method of 4-chloro-6-fluoroquinoline. The preparation method comprises the steps: with fluoroaniline as a starting material, firstly, carrying out Michael addition reaction with acrylic acid to obtain an intermediate 3-(4-fluoroanilino)propionic acid; followed by, carrying out a condensation cyclization reaction to obtain an intermediate 6-fluoro-2,3-dihydroquinoline-4(1H)-one; and finally, carrying out halogenation and dehydrogenation reaction to obtain 4-chloro-6-fluoroquinoline. The preparation method has the advantages of wide raw material sources and relatively low cost, thereby having relatively low production cost; at the same time, the preparation method has the advantages of relatively short synthesis route and relatively high yield, especially has mild reaction conditions, has no need of special high temperature equipment, and is suitable for industrialized mass production.
4-Piperidino-2-phenylquinolines
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, (2008/06/13)
Disclosed are compounds of the formula STR1 wherein: R1 and R2 may be either the same or different and each is hydrogen or lower alkyl; and wherein R3 and R4 may be either the same or different and each is hydrogen, halogen, or lower alkyl, with the proviso that R3 and R4 cannot both be hydrogen. These compounds are useful as anticonvulsant or anxiolytic agents.
7-Hydroxy-benzo[ij]quinolizine-2-carboxylic acids, intermediates, and a method for their production
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, (2008/06/13)
Intermediates for and a process for preparing certain substituted 6,7-dihydro-7-hydroxy-1-oxo-1H,5H-benzo[ij]quinolizine carboxylic acids is described. The end products are useful antibacterial agents.
7-Hydroxy-benzo[ij]quinolizine-2-carboxylic acids and derivatives thereof
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, (2008/06/13)
Certain substituted 6,7-dihydro-7-hydroxy-1-oxo-1H,5H-benzo[ij]quinolizine-2-carboxylic acids and salt and ester derivatives thereof are described. These compounds are useful antibacterial agents.