(1,1-Dimethylprop-2-ynyloxy)acetic acid methyl ester → [3-(4'-Chloro-4-methylbiphenyl-3-yl)-1,1-dimethylprop-2-ynyloxy]acetic acid methyl ester

HRID 468208ノート

反応式

HRID 468208 の反応式
Br[C:2]1[CH:3]=[C:4]([C:9]2[CH:14]=[CH:13][C:12]([Cl:15])=[CH:11][CH:10]=2)[CH:5]=[CH:6][C:7]=1[CH3:8].[CH3:16][O:17][C:18](=[O:26])[CH2:19][O:20][C:21]([CH3:25])([CH3:24])[C:22]#[CH:23]>C(N(CC)CC)C.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.[Cu]I>[CH3:16][O:17][C:18](=[O:26])[CH2:19][O:20][C:21]([CH3:24])([CH3:25])[C:22]#[C:23][C:2]1[CH:3]=[C:4]([C:9]2[CH:14]=[CH:13][C:12]([Cl:15])=[CH:11][CH:10]=2)[CH:5]=[CH:6][C:7]=1[CH3:8]

参加物

6

反応物 2

HCID 13005744(1,1-Dimethylprop-2-ynyloxy)acetic acid methyl esterHCID 594459301-Bromo-5-(4-chlorophenyl)-2-methylbenzene

生成物 1

HCID 58312427[3-(4'-Chloro-4-methylbiphenyl-3-yl)-1,1-dimethylprop-2-ynyloxy]acetic acid methyl ester収率 42%

試薬・触媒・溶媒 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)触媒HCID 178418476HCID 178418476、化合物触媒HCID 8471Triethylamine溶媒

反応条件

温度
80 °C

実験手順

To a solution of 3-bromo-4′-chloro-4-methylbiphenyl (12.6 g, 44.7 mmol) and (1,1-dimethylprop-2-ynyloxy)acetic acid methyl ester (prepared according to WO2001/066544) (8.4 g, 53.8 mmol) in triethylamine (70 ml) is added bis(triphenylphosphine)palladium(II) dichloride (0.63 g, 0.9 mmol) and copper(I) iodide (0.34 g, 1.8 mmol). The reaction mixture is degassed and flushed with nitrogen (×3), then stirred under nitrogen at 80° C. for one hour. The cooled mixture is filtered through diatomaceous earth to remove the catalyst, and the filtrate evaporated in vacuo. The residue is resubjected to the same reaction conditions (8.4 g 1,1-dimethylprop-2-ynyloxy)acetic acid methyl ester, 0.63 g bis(triphenylphosphine)-palladium(II) dichloride, 0.34 g copper(I) iodide in 70 ml triethylamine under nitrogen) and stirred at 80° C. for one hour. The cooled mixture is filtered through diatomaceous earth, then concentrated in vacuo and purified by flash chromatography (hexane/ethyl acetate 3:1) to afford [3-(4′-chloro-4-methylbiphenyl-3-yl)-1,1-dimethylprop-2-ynyloxy]acetic acid methyl ester (6.70 g,) as an oil.

後処理

  1. customThe reaction mixture is degassed
  2. customflushed with nitrogen (×3)
  3. filtrationThe cooled mixture is filtered through diatomaceous earth
  4. customto remove the catalyst
  5. customthe filtrate evaporated in vacuo
  6. customThe residue is resubjected to the same reaction conditions (8.4 g 1,1-dimethylprop-2-ynyloxy)acetic acid methyl ester, 0.63 g bis(triphenylphosphine)-palladium(II) dichloride, 0.34 g copper(I) iodide in 70 ml triethylamine under nitrogen) and
  7. stirringstirred at 80° C. for one hour
  8. filtrationThe cooled mixture is filtered through diatomaceous earth
  9. concentrationconcentrated in vacuo
  10. custompurified by flash chromatography (hexane/ethyl acetate 3:1)

出典と根拠

ORDレコード
ord-b6cf6fb0ca9341159255d1e5f2612b7a
出典データセット
uspto-grants-2014_01
特許番号
US08623907B2

反応ノート

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