Allyl bromide → 6-Allyloxy-4-ethyl-3-methyl-phthalic Acid Dimethyl Ester

HRID 2114242ノート

反応式

HRID 2114242 の反応式
[CH3:1][O:2][C:3](=[O:18])[C:4]1[C:5](=[C:10]([CH3:17])[C:11]([CH2:15][CH3:16])=[CH:12][C:13]=1[OH:14])[C:6]([O:8][CH3:9])=[O:7].C(=O)([O-])[O-].[K+].[K+].[CH2:25](Br)[CH:26]=[CH2:27]>CN(C=O)C>[CH3:1][O:2][C:3](=[O:18])[C:4]1[C:5](=[C:10]([CH3:17])[C:11]([CH2:15][CH3:16])=[CH:12][C:13]=1[O:14][CH2:27][CH:26]=[CH2:25])[C:6]([O:8][CH3:9])=[O:7]

参加物

5

反応物 3

HCID 7841Allyl bromideHCID 11430Potassium CarbonateHCID 597944774-Ethyl-6-hydroxy-3-methyl-phthalic Acid Dimethyl Ester

生成物 1

HCID 574598616-Allyloxy-4-ethyl-3-methyl-phthalic Acid Dimethyl Ester収率 83.1%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
60 °C

実験手順

4-Ethyl-6-hydroxy-3-methyl-phthalic acid dimethyl ester (1.01 g, 4.02 mmol) was dissolved in DMF (5 mL). Potassium carbonate (3.33 g, 24.14 mmol) was added, followed by allylbromide (2.92 g, 24.14 mmol). The suspension was heated at 60° C. After 14 hours, the reaction was cooled to room temperature and filtered. The solvents were removed in vacuo and the crude material was purified by silica gel chromatography to provide 0.976 g (83%) of the desired product as a colorless oil. 1H NMR (300 MHz, CDCl3): δ=1.16 (t, J=7.2 Hz, 3H), 2.20 (s, 3H), 2.62 (q, J=7.2 Hz, 2H), 3.83 (s, 3H), 3.84 (s, 3H), 4.57 (m, 2H), 5.26 (dd, J=9.3, 1.5 Hz, 1H), 5.41 (dd, J=13.5, 1.5 Hz, 1H), 5.98 (m, 1H), 6.82 (s, 1H) ppm.

後処理

  1. temperaturethe reaction was cooled to room temperature
  2. filtrationfiltered
  3. customThe solvents were removed in vacuo
  4. customthe crude material was purified by silica gel chromatography

出典と根拠

ORDレコード
ord-2964598c0133455aa2810cec86b03e77
出典データセット
uspto-grants-2008_10
特許番号
US07432261B2

反応ノート

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