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Description
| - The treatment of 3-acyl-4-hydroxy-1H-quinolin-2-ones (1) with ethyl (triphenylphosphoranylidene)acetate leads to 5,6-dihydro-2H-pyranol[3,2-c]quinoline-2,5-diones (2), which were brominated to 3-bromo derivatives (4). Alkaline hydrolysis of 4 gives 2-alkyl/aryl-4-oxo-4,5-dihydrofuro[3,2-c]quinoline-3-carboxylic acids (6), which were decarboxylated to 2-alkyl/aryl-5H-furo[3,2-c]quinolin-4-ones (8). The reaqction of 3-acyl-4-hydroxy-1-methyl-1H-quinolin-2-one (1a) with ethyl (triphenylphosphoranylidene)chloroacetate proceeds not only at the acetyl but also at the amide group to give a mixture of ethyl 3,5-dimethyl-4-oxo-4,5-dihydrofuro[3,2-c]quinoline-2-carboxylate (11a) and ethyl 4,6-dimethyl-2-oxo-5,6-dihydro-2H-pyrano[3,2-c]quinolin-5-ylidene(chloro)acetate (12a). The reaction mechanism of the molecular rearrangement of 4 to 6 is discussed.
- The treatment of 3-acyl-4-hydroxy-1H-quinolin-2-ones (1) with ethyl (triphenylphosphoranylidene)acetate leads to 5,6-dihydro-2H-pyranol[3,2-c]quinoline-2,5-diones (2), which were brominated to 3-bromo derivatives (4). Alkaline hydrolysis of 4 gives 2-alkyl/aryl-4-oxo-4,5-dihydrofuro[3,2-c]quinoline-3-carboxylic acids (6), which were decarboxylated to 2-alkyl/aryl-5H-furo[3,2-c]quinolin-4-ones (8). The reaqction of 3-acyl-4-hydroxy-1-methyl-1H-quinolin-2-one (1a) with ethyl (triphenylphosphoranylidene)chloroacetate proceeds not only at the acetyl but also at the amide group to give a mixture of ethyl 3,5-dimethyl-4-oxo-4,5-dihydrofuro[3,2-c]quinoline-2-carboxylate (11a) and ethyl 4,6-dimethyl-2-oxo-5,6-dihydro-2H-pyrano[3,2-c]quinolin-5-ylidene(chloro)acetate (12a). The reaction mechanism of the molecular rearrangement of 4 to 6 is discussed. (en)
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Title
| - A new synthesis of 4-alkyl/aryl-5,6-dihydro-2H-pyrano[3,2-c]quinoline-2,5-diones and molecular rearrangement of their 3-bromo derivatives to 2-alkyl/aryl-4-oxo-...
- A new synthesis of 4-alkyl/aryl-5,6-dihydro-2H-pyrano[3,2-c]quinoline-2,5-diones and molecular rearrangement of their 3-bromo derivatives to 2-alkyl/aryl-4-oxo-... (en)
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skos:prefLabel
| - A new synthesis of 4-alkyl/aryl-5,6-dihydro-2H-pyrano[3,2-c]quinoline-2,5-diones and molecular rearrangement of their 3-bromo derivatives to 2-alkyl/aryl-4-oxo-...
- A new synthesis of 4-alkyl/aryl-5,6-dihydro-2H-pyrano[3,2-c]quinoline-2,5-diones and molecular rearrangement of their 3-bromo derivatives to 2-alkyl/aryl-4-oxo-... (en)
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skos:notation
| - RIV/70883521:28110/03:63501410!RIV/2004/MSM/281104/N
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http://linked.open.../vavai/riv/strany
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http://linked.open...avai/riv/aktivita
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http://linked.open...avai/riv/aktivity
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http://linked.open...iv/cisloPeriodika
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http://linked.open...vai/riv/dodaniDat
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http://linked.open...aciTvurceVysledku
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http://linked.open.../riv/druhVysledku
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http://linked.open...iv/duvernostUdaju
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http://linked.open...titaPredkladatele
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http://linked.open...dnocenehoVysledku
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http://linked.open...ai/riv/idVysledku
| - RIV/70883521:28110/03:63501410
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - Wittig reaction, molecular rearrangement (en)
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http://linked.open.../riv/klicoveSlovo
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http://linked.open...odStatuVydavatele
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http://linked.open...ontrolniKodProRIV
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http://linked.open...i/riv/nazevZdroje
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http://linked.open...in/vavai/riv/obor
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http://linked.open...ichTvurcuVysledku
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http://linked.open...cetTvurcuVysledku
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http://linked.open...ocetUcastnikuAkce
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http://linked.open...nichUcastnikuAkce
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http://linked.open...UplatneniVysledku
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http://linked.open...v/svazekPeriodika
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http://linked.open...iv/tvurceVysledku
| - Halada, Petr
- Sedmera, Petr
- Klásek, Antonín
- Kořistek, Kamil
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http://linked.open...n/vavai/riv/zamer
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issn
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number of pages
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http://localhost/t...ganizacniJednotka
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