Homophthalic acid → 3-(4-Methoxybenzyl)isocoumarin

HRID 432667

反応式

HRID 432667 の反応式
[C:1]([OH:13])(=O)[CH2:2][C:3]1[C:4](=[CH:8][CH:9]=[CH:10][CH:11]=1)[C:5]([OH:7])=O.[CH3:14][O:15][C:16]1[CH:21]=[CH:20][C:19]([CH2:22]C(Cl)=O)=[CH:18][CH:17]=1>C1(C)C=CC=CC=1>[CH3:14][O:15][C:16]1[CH:21]=[CH:20][C:19]([CH2:22][C:1]2[O:13][C:5]([C:4]3[C:3]([CH:2]=2)=[CH:11][CH:10]=[CH:9][CH:8]=3)=[O:7])=[CH:18][CH:17]=1

参加物

4

反応物 2

HCID 66643Homophthalic acidHCID 27346884-Methoxyphenylacetyl chloride

生成物 1

HCID 187602473-(4-Methoxybenzyl)isocoumarin収率 26%

試薬・触媒・溶媒 1

HCID 1140Toluene溶媒

反応条件

温度
200 °C

実験手順

A well-stirred mixture of homophthalic acid (10 g; 56 mmol) and 2-(4-methoxyphenyl)acetyl chloride (10 g, 230 mmol) was heated at 200° C. for 3 hours under nitrogen then cooled to 50° C. and dissolved in toluene (100 ml), The solvent was removed in vacuo and the residue was dissolved in methanol (100 ml). Silica (30 g) was added and the solvent was removed in vacuo. The crude product, thereby adsorbed onto silica, was applied to the top of a column of silica and purified by chromatography using 10-50% mixtures of ethyl acetate and hexane as eluant. Appropriate fractions were combined and the solvents removed in vacuo to give 3-(4-methoxybenzyl)isocoumarin (0.9 g, 26%) as an oil; δH 3.75 (3H, s), 3.80 (2H, s), 6.50 (1H, s), 6.95 (2H, d, J=8.9 Hz), 7.30 (2H, d, J=8.9 Hz), 7.40-7.90 (3H, m), 8.10 (1H, d); m/z (M+H)+. 267.

後処理

  1. temperaturethen cooled to 50° C.
  2. customThe solvent was removed in vacuo
  3. dissolutionthe residue was dissolved in methanol (100 ml)
  4. additionSilica (30 g) was added
  5. customthe solvent was removed in vacuo
  6. custompurified by chromatography
  7. customthe solvents removed in vacuo

出典と根拠

ORDレコード
ord-63120e174dd04a94ac4274466862b099
出典データセット
uspto-grants-2003_12
特許番号
US06664269B2

関連ノート

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