Ethylene → 4'-Methyl-5-thiazol-2-yl-biphenyl-3-carboxylic acid methyl ester

HRID 506611노트

반응식

HRID 506611 반응식
BrCCBr.C=C.C[Si](Cl)(C)C.Br[C:13]1[S:14][CH:15]=[CH:16][N:17]=1.[CH3:18][O:19][C:20]([C:22]1[CH:23]=[C:24]([C:29]2[CH:34]=[CH:33][C:32]([CH3:35])=[CH:31][CH:30]=2)[CH:25]=[C:26](I)[CH:27]=1)=[O:21]>C1COCC1.[Zn].C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:18][O:19][C:20]([C:22]1[CH:23]=[C:24]([C:29]2[CH:30]=[CH:31][C:32]([CH3:35])=[CH:33][CH:34]=2)[CH:25]=[C:26]([C:13]2[S:14][CH:15]=[CH:16][N:17]=2)[CH:27]=1)=[O:21]

참가 물질

9

반응물 5

HCID 6325EthyleneHCID 6397ChlorotrimethylsilaneHCID 78391,2-DibromoethaneHCID 764302-BromothiazoleHCID 578515885-Iodo-4'-methyl-biphenyl-3-carboxylic acid methyl ester

생성물 1

HCID 594325714'-Methyl-5-thiazol-2-yl-biphenyl-3-carboxylic acid methyl ester수율 80%

시약·촉매·용매 3

HCID 23994Zinc촉매HCID 178418397HCID 178418397, 화합물촉매HCID 8028Tetrahydrofuran용매2회

실험 절차

To a stirred suspension of zinc dust (3.06 g, 46.86 mmol) in THF (15 ml) was added 1,2-dibromoethane (0.327 ml, 3.83 mmol). The reaction mixture was heated until the evolution of ethylene was completed. Trimethylsilyl chloride (0.013 ml), THF (5 ml) and 2-bromothiazole (1.39 ml, 15.62 mmol) were added, and the reaction mixture was stirred for 20 minutes at room temperature. 5-Iodo-4′-methyl-biphenyl-3-carboxylic acid methyl ester (5.0 g, 14.2 mmol) and Pd(PPh3)4 (492.3 mg, 0.462 mmol) were added, and the mixture was refluxed for 14 hours. The reaction mixture was cooled in an ice bath and extracted with EtOAc, washed with saturated aqueous NH4Cl, brine, dried over anhydrous Na2SO4, filtered, and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel, eluting with hexanes-ethyl acetate (1:6), giving 4′-methyl-5-thiazol-2-yl-biphenyl-3-carboxylic acid methyl ester as a light yellow solid (0.42 g, 80%). MS (M+H)=310.

후처리

  1. temperaturethe mixture was refluxed for 14 hours
  2. temperatureThe reaction mixture was cooled in an ice bath
  3. extractionextracted with EtOAc
  4. washwashed with saturated aqueous NH4Cl, brine
  5. dry with materialdried over anhydrous Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe residue was purified by flash column chromatography on silica gel
  9. washeluting with hexanes-ethyl acetate (1:6)

출처 및 근거

ORD 기록
ord-2bffc296fe3e44eca259272b68054e5f
출처 데이터셋
uspto-grants-2010_08
특허 번호
US07786110B2

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