Triethylamine → benzyl 5-(1H-imidazol-5-yl)pent-4-ynoate

HRID 870582노트

반응식

HRID 870582 반응식
I[C:2]1[N:3]=[CH:4][NH:5][CH:6]=1.[C:7]([O:13][CH2:14][C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1)(=[O:12])[CH2:8][CH2:9][C:10]#[CH:11].C(N(CC)CC)C>CN(C)C=O.O.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>[NH:3]1[C:2]([C:11]#[C:10][CH2:9][CH2:8][C:7]([O:13][CH2:14][C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)=[O:12])=[CH:6][N:5]=[CH:4]1

참가 물질

8

반응물 3

HCID 8471TriethylamineHCID 561097Benzyl pent-4-ynoateHCID 178506559HCID 178506559, 화합물

생성물 1

HCID 86726543benzyl 5-(1H-imidazol-5-yl)pent-4-ynoate수율 69%

시약·촉매·용매 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)촉매HCID 178418476HCID 178418476, 화합물촉매HCID 962Water용매HCID 6228Dimethylformamide용매

반응 조건

온도
75 °C

실험 절차

Add bis(triphenylphosphine)palladium(II) chloride (0.14 g; 0.1 equiv; 0.20 mmoles) and copper(I) iodide (0.039 mg; 0.1 equiv; 0.20 mmoles) to a deoxygenated solution of 4-iodo-1H-imidazole (0.388 g; 1.0 equiv; 2.00 mmoles), benzyl pent-4-ynoate (0.376 g; 1.0 equiv; 2.00 mmoles), and triethylamine (0.84 mL; 3 equiv; 6.0 mmoles) in dimethylformamide (8 mL). Heat the mixture to 75° C. for 16 hours, then dilute the mixture with water (30 mL) and extract 3× with ethyl acetate. Wash the combined organic extracts with brine, dry over magnesium sulfate, filter, and concentrate to provide the crude product. Purify the crude product by column chromatography (0 to 10% methanol in dichloromethane) to afford benzyl 5-(1H-imidazol-5-yl)pent-4-ynoate (0.35 g; 69%) as a colorless oil: MS (m/z): 255(M+1).

후처리

  1. extractionextract 3× with ethyl acetate
  2. washWash the combined organic extracts with brine
  3. dry with materialdry over magnesium sulfate
  4. filtrationfilter
  5. concentrationconcentrate
  6. customto provide the crude product
  7. customPurify the crude product by column chromatography (0 to 10% methanol in dichloromethane)

출처 및 근거

ORD 기록
ord-155eecd8ed134ae3b01bebfc5ff72213
출처 데이터셋
uspto-grants-2015_03
특허 번호
US08969555B2

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