Sodium Carbonate → Tert-butyl 4-phenylpyridin-2-ylcarbamate

HRID 1245470노트

반응식

HRID 1245470 반응식
I[C:2]1[CH:7]=[CH:6][N:5]=[C:4]([NH:8][C:9](=[O:15])[O:10][C:11]([CH3:14])([CH3:13])[CH3:12])[CH:3]=1.[C:16]1(B(O)O)[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1.C(=O)([O-])[O-].[Na+].[Na+]>O1CCOCC1.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>[C:16]1([C:2]2[CH:7]=[CH:6][N:5]=[C:4]([NH:8][C:9](=[O:15])[O:10][C:11]([CH3:14])([CH3:13])[CH3:12])[CH:3]=2)[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1

참가 물질

6

반응물 3

HCID 10340Sodium CarbonateHCID 66827Phenylboronic AcidHCID 11484026(4-Iodo-Pyridin-2-Yl)-Carbamic Acid Tert-Butyl Ester

생성물 1

HCID 21912853Tert-butyl 4-phenylpyridin-2-ylcarbamate

시약·촉매·용매 2

HCID 178418397HCID 178418397, 화합물촉매HCID 312751,4-Dioxane용매

실험 절차

Tetrakis(triphenylphosphine)palladium(0) (340 mg, 0.29 mmol, 0.050 equiv) was added to a deoxygenated mixture of tert-butyl 4-iodopyridin-2-ylcarbamate (1-1, 1.87 g, 5.84 mmol, 1 equiv), phenyl boronic acid (1.07 g, 8.76 mmol, 1.50 equiv), and aqueous saturated sodium carbonate solution (2.0 M, 8.8 mL, 18 mmol, 3.0 equiv) in dioxane (50 mL), and the resulting mixture was heated at reflux for 18 h. The reaction mixture was cooled then concentrated. The residue was partitioned between half-saturated aqueous NaCl solution (100 mL) and EtOAc (100 mL). The organic layer was dried over sodium sulfate, and concentrated. The residue was purified by flash column chromatography (dichloromethane, initially, grading to 40% EtOAc in dichloromethane) to give tert-butyl 4-phenylpyridin-2-ylcarbamate (1-2) as an off-white solid. LRMS m/z (M+H) Calcd: 214.3 (minus t-Bu), 171.3 (minus Boc); found 215.0 and 171.0.

후처리

  1. temperaturethe resulting mixture was heated
  2. temperatureat reflux for 18 h
  3. temperatureThe reaction mixture was cooled
  4. concentrationthen concentrated
  5. customThe residue was partitioned between half-saturated aqueous NaCl solution (100 mL) and EtOAc (100 mL)
  6. dry with materialThe organic layer was dried over sodium sulfate
  7. concentrationconcentrated
  8. customThe residue was purified by flash column chromatography (dichloromethane

출처 및 근거

ORD 기록
ord-11134824e475461eb96b5610241e6401
출처 데이터셋
uspto-grants-2006_10
특허 번호
US07125888B2

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