Potassium Carbonate → HCID 24720233、化合物

HRID 449177ノート

反応式

HRID 449177 の反応式
Br[C:2]1[C:11](=[O:12])[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[O:4][CH:3]=1.C([O-])([O-])=O.[K+].[K+].[CH3:19][O:20][C:21]1[CH:22]=[C:23](B(O)O)[CH:24]=[CH:25][CH:26]=1>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[CH3:19][O:20][C:21]1[CH:26]=[C:25]([CH:24]=[CH:23][CH:22]=1)[C:2]1[C:11](=[O:12])[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[O:4][CH:3]=1

参加物

5

反応物 3

HCID 11430Potassium CarbonateHCID 5212563-BromochromoneHCID 2734370(3-Methoxyphenyl)boronic acid

生成物 1

HCID 24720233HCID 24720233、化合物収率 51%

試薬・触媒・溶媒 1

HCID 178418476HCID 178418476、化合物触媒

反応条件

温度
80 °C

実験手順

Prepared using a modified procedure of Hoshino et al. (Bulletin of the Chemical Society of Japan 1988, 61, (8), 3008-3010; herein incorporated by reference in its entirety). To a 10 mL round bottom flask was added 3-bromochromone (Gammill, R. B. Synthesis-Stuttgart 1979, (11), 901-903; herein incorporated by reference in its entirety) (225 mg, 1 mmol), K2CO3 (415 mg, 3 mmol), 3-methoxyphenylboronic acid (167 mg, 1.1 mmol), and PdCl2(PPh3)2(21 mg, 0.03 mmol). The flask was equipped with a reflux condenser and purged with N2, followed by addition of THF/H2O (2.5 mL/0.5 mL). The reaction was stirred at 80° C. for 4 hr. The reaction was then run through a plug of Celite and rinsed with EtOAc. The organic phase was washed with brine and dried over anhydrous Na2SO4. Purified by flash column chromatography (SiO2, 15% EtOAc/Hex) and recrystallized from CH2Cl2/Hex to afford 5 (128 mg, 51%) as an off-white solid. Analytical data for isoflavone 5: 1H NMR (500 MHz, CDCl3) δ 8.34 (d, J=9.5 Hz, 1H), 8.06 (s, 1H), 7.70 (app t, J=8.5 Hz, 1H), 7.50 (d, J=8.5 Hz, 1H), 7.45 (app t, J =7.5 Hz, 1H), 7.37 (app t, J =8 Hz, 1H), 7.19 (s, 1H), 7.15 (d, J=7 Hz, 1H), 6.96 (d, J=8.5 Hz, 1H), 3.87 (s, 3H); 13C NMR (125 MHz, CDCl3) δ 176.4, 159.8, 156.4, 153.4, 133.9, 133.4, 129.8, 126.7, 125.5, 124.8, 121.5, 118.3, 114.7, 114.4, 55.6; LCMS: Mass calculated for C16H12O3, [M+H]+, 253. Found 253.

後処理

  1. customPrepared
  2. customSynthesis-Stuttgart 1979, (11), 901-903
  3. customThe flask was equipped with a reflux condenser
  4. custompurged with N2
  5. additionfollowed by addition of THF/H2O (2.5 mL/0.5 mL)
  6. washrinsed with EtOAc
  7. washThe organic phase was washed with brine
  8. dry with materialdried over anhydrous Na2SO4
  9. customPurified by flash column chromatography (SiO2, 15% EtOAc/Hex)
  10. customrecrystallized from CH2Cl2/Hex

出典と根拠

ORDレコード
ord-36c6199e2f1b4ebf8a83fc91bc119cdf
出典データセット
uspto-grants-2013_07
特許番号
US08481760B2

反応ノート

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