Triethylamine → Ethyl 3-methyl-4-((triethylsilyl)ethynyl)benzoate

HRID 340286노트

반응식

HRID 340286 반응식
Br[C:2]1[CH:12]=[CH:11][C:5]([C:6]([O:8][CH2:9][CH3:10])=[O:7])=[CH:4][C:3]=1[CH3:13].[CH2:14]([Si:16]([CH2:21][CH3:22])([CH2:19][CH3:20])[C:17]#[CH:18])[CH3:15].C(N(CC)CC)C>CN(C=O)C.C(OCC)(=O)C.[OH-].[NH4+].[Cu]I>[CH3:13][C:3]1[CH:4]=[C:5]([CH:11]=[CH:12][C:2]=1[C:15]#[C:14][Si:16]([CH2:21][CH3:22])([CH2:19][CH3:20])[CH2:17][CH3:18])[C:6]([O:8][CH2:9][CH3:10])=[O:7]

참가 물질

8

반응물 3

HCID 8471TriethylamineHCID 637947(Triethylsilyl)acetyleneHCID 21729626Ethyl 4-bromo-3-methylbenzoate

생성물 1

HCID 66874679Ethyl 3-methyl-4-((triethylsilyl)ethynyl)benzoate

시약·촉매·용매 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)촉매HCID 6228Dimethylformamide용매HCID 8857Ethyl Acetate용매HCID 14923Ammonium Hydroxide용매

실험 절차

A solution of ethyl 4-bromo-3-methylbenzoate (from the previous step) (1.0 eq.), triethyl(ethynyl)silane (1.1 eq.), trans-dichlororbis(triphenylphosphine)palladium (II) (10 mol %), copper (I) iodide (20 mol %), and triethylamine (5.0 eq.) in DMF (0.3 M) was stirred at 60° C. overnight. After cooling to ambient temperature, the reaction mixture was diluted with ethyl acetate and 10% aqueous ammonium hydroxide. The two phases were separated, and the aqueous layer was extracted twice with ethyl acetate. The combined organic layers were washed with brine, dried over anhydrous MgSO4, and concentrated en vacuo. The crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO) using 0-5% ethyl acetate in hexane to give ethyl 3-methyl-4-((triethylsilyl)ethynyl)benzoate as a yellow oil.

후처리

  1. customThe two phases were separated
  2. extractionthe aqueous layer was extracted twice with ethyl acetate
  3. washThe combined organic layers were washed with brine
  4. dry with materialdried over anhydrous MgSO4
  5. concentrationconcentrated en vacuo
  6. customThe crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO)

출처 및 근거

ORD 기록
ord-e7d1da00bdf544eb8d3d21076df84a62
출처 데이터셋
uspto-grants-2014_11
특허 번호
US08895577B2

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