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Acetate → HCID 89781946、化合物

HRID 1055918
ノート
印刷プレビュー

反応式

HRID 1055918 の反応式
C([Sn](CCCC)(CCCC)[C:6]([O:8]CC)=[CH2:7])CCC.Br[C:20]1[CH:21]=[CH:22][CH:23]=[C:24]2[C:29]=1[N:28]=[C:27]([C:30]([O:32][CH3:33])=[O:31])[CH:26]=[CH:25]2.C(OC=C)=C.C([O-])(=O)C>C1COCC1.Cl.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.CCOC(C)=O.C1(C)C=CC=CC=1>[C:6]([C:20]1[CH:21]=[CH:22][CH:23]=[C:24]2[C:29]=1[N:28]=[C:27]([C:30]([O:32][CH3:33])=[O:31])[CH:26]=[CH:25]2)(=[O:8])[CH3:7]
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

10

反応物 4

HCID 175AcetateHCID 8024Vinyl etherHCID 619414Stannane, tributyl(1-ethoxyethenyl)-HCID 58567110Methyl 8-bromoquinoline-2-carboxylate

生成物 1

HCID 89781946HCID 89781946、化合物収率 82.1%

試薬・触媒・溶媒 5

HCID 313Hydrochloric Acid触媒
HCID 178418397
HCID 178418397、化合物
触媒
HCID 1140Toluene溶媒
HCID 8028Tetrahydrofuran溶媒
HCID 8857Ethyl Acetate溶媒

反応条件

温度
100 °C

実験手順

A mixture of Pd(PPh3)4 (608 mg, 0.53 mmol), tributyl(1-ethoxyvinyl)tin (3.91 mL, 11.57 mmol), methyl 8-bromoquinoline-2-carboxylate (2.80 g, 10.52 mmol), and toluene (50 mL) was heated under argon at 100° C. for 18 h. The mixture was then concentrated under reduced pressure and adsorbed onto silica gel. Column chromatography (silica gel, 10-100% EtOAc in hexanes) afforded a mixture of vinyl ether (M+1=258.0) and the desired acetate. This mixture was dissolved in THF (40 mL), the solution was cooled to 0° C., 10 drops of 1N HCl were added, and the solution was stirred at 0° C. for 5 min. EtOAc (100 mL) was added and the resulting solution was washed successively with 1N NaOH (20 mL), water (40 mL) and brine (40 mL). Significant product remained in the aq. layer and was extracted with 25% IPA in CHCl3. The combined organic layers were dried over MgSO4, filtered, and concentrated to give methyl 8-acetylquinoline-2-carboxylate (1.98 g, 8.64 mmol, 82% yield) as a tan solid: 1H NMR (400 MHz, DMSO-d6) δ ppm 8.69 (d, J=8.4 Hz, 1H), 8.27 (dd, J=8.2, 1.4 Hz, 1H), 8.20 (d, J=8.4 Hz, 1H), 8.00 (dd, J=7.2, 1.4 Hz, 1H), 7.79-7.86 (m, 1H), 3.98 (s, 3H), 2.92 (s, 3H). m/z (ESI, +ve ion) 230.0 (M+H)+.

後処理

  1. concentrationThe mixture was then concentrated under reduced pressure
  2. customColumn chromatography (silica gel, 10-100% EtOAc in hexanes) afforded
  3. temperaturethe solution was cooled to 0° C.
  4. washthe resulting solution was washed successively with 1N NaOH (20 mL), water (40 mL) and brine (40 mL)
  5. extractionwas extracted with 25% IPA in CHCl3
  6. dry with materialThe combined organic layers were dried over MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated

出典と根拠

ORDレコード
ord-cfc5e650ac334339ac860a4b28eda408
出典データセット
uspto-grants-2016_07
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09394297B2

反応ノート

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