Sodium Carbonate → 5-(4-acetylpyridin-3-yl)-3-methylbenzo[d]oxazol-2(3H)-one

HRID 1253927노트

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HRID 1253927 반응식
Br[C:2]1[CH:3]=[N:4][CH:5]=[CH:6][C:7]=1[C:8](=[O:10])[CH3:9].[CH3:11][N:12]1[C:16]2[CH:17]=[C:18](B3OC(C)(C)C(C)(C)O3)[CH:19]=[CH:20][C:15]=2[O:14][C:13]1=[O:30].C(=O)([O-])[O-].[Na+].[Na+]>C1(C)C=CC=CC=1.C(O)C.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:8]([C:7]1[CH:6]=[CH:5][N:4]=[CH:3][C:2]=1[C:18]1[CH:19]=[CH:20][C:15]2[O:14][C:13](=[O:30])[N:12]([CH3:11])[C:16]=2[CH:17]=1)(=[O:10])[CH3:9]

참가 물질

7

반응물 3

HCID 10340Sodium CarbonateHCID 137934561-(3-Bromopyridin-4-yl)ethan-1-oneHCID 595350693-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2(3H)-benzoxazolone

생성물 1

HCID 498020215-(4-acetylpyridin-3-yl)-3-methylbenzo[d]oxazol-2(3H)-one수율 55.2%

시약·촉매·용매 3

HCID 178418397HCID 178418397, 화합물촉매HCID 702Ethanol용매HCID 1140Toluene용매

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온도
90 °C

실험 절차

A mixture of 1-(3-bromopyridin-4-yl)ethanone (50 mg, 0.250 mmol), 3-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]oxazol-2(3H)-one (68.8 mg, 0.250 mmol), polymer bound PalladiumTetrakis (56.8 mg, 6.25 μmol) and sodium carbonate (250 μl, 0.500 mmol) in toluene (1 mL) and ethanol (1 mL) was heated to 90° C. in microwave for 45 min. After filtration through a pad of Na2SO4, the solvent was removed in vacuum. The residue was purified by flash column (MeOH—CH2Cl2, v/v, 1%-1.5%) and yielded colorless solid (37 mg). ESI-MS m/z: 269.0 [M+1]+, Retention time 1.03 min; 1H NMR (400.3 MHz, CDCl3): δ 2.13 (s, 3H), 344 (s, 3H), 6.95 (d, J=1.48 Hz, 1H), 7.07 (dd, J=8.2, 1.68 Hz, 1H), 7.29 (d, J=8.2 Hz, 1H), 7.37 (d J=5 Hz, 1H), 8.69 (s, 1H), 8.73 (d, J=5 Hz, 1H).

후처리

  1. filtrationAfter filtration through a pad of Na2SO4
  2. customthe solvent was removed in vacuum
  3. customThe residue was purified by flash column (MeOH—CH2Cl2, v/v, 1%-1.5%)

출처 및 근거

ORD 기록
ord-c04d8fb8b23f452095a50db93690123c
출처 데이터셋
uspto-grants-2013_06
특허 번호
US08455522B2

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