Cesium carbonate → 1'-(diphenylmethyl)-5,6-difluorospiro[1-benzofuran-3,3'-indol]-2'(1'H)-one

HRID 2385038노트

반응식

HRID 2385038 반응식
[F:1][C:2]1[C:7]([F:8])=[CH:6][C:5]([CH:9]2[C:17]3[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=3)[N:11]([CH:18]([C:25]3[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=3)[C:19]3[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=3)[C:10]2=[O:31])=[C:4]([OH:32])[CH:3]=1.[C:33](=O)([O-])[O-].[Cs+].[Cs+].ClCI>O1CCCC1>[C:19]1([CH:18]([C:25]2[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=2)[N:11]2[C:12]3[C:17](=[CH:16][CH:15]=[CH:14][CH:13]=3)[C:9]3([C:5]4[CH:6]=[C:7]([F:8])[C:2]([F:1])=[CH:3][C:4]=4[O:32][CH2:33]3)[C:10]2=[O:31])[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1

참가 물질

5

반응물 3

HCID 10796Cesium carbonateHCID 11644ChloroiodomethaneHCID 673572403-(4,5-difluoro-2-hydroxyphenyl)-1-(diphenylmethyl)-1,3-dihydro-2H-indol-2-one

생성물 1

HCID 593520761'-(diphenylmethyl)-5,6-difluorospiro[1-benzofuran-3,3'-indol]-2'(1'H)-one수율 70%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

To a solution of 3-(4,5-difluoro-2-hydroxyphenyl)-1-(diphenylmethyl)-1,3-dihydro-2H-indol-2-one (6.30 g, 14.7 mmol) in anhydrous tetrahydrofuran (120 mL) under argon was added cesium carbonate (14.4 g, 44.2 mmol), followed by the addition of chloroiodomethane (3.21 mL, 44.2 mmol) dropwise. After 20 h, the reaction mixture was concentrated in vacuo and re-dissolved in ethyl acetate (50 mL) and water (50 mL). The aqueous layer was extracted with ethyl acetate (6×50 mL). Some product was filtered off as a colorless precipitate. The combined organic solution was washed with water (2×150 mL) and brine (150 mL), dried over sodium sulfate, filtered, and concentrated. Precipitation from diethyl ether/hexanes afforded 1′-(diphenylmethyl)-5,6-difluorospiro[1-benzofuran-3,3′-indol]-2′(1′H)-one (4.51 g, 70%) as a colorless solid: mp 213-216° C.; 1H NMR (300 MHz, CDCl3) δ 7.41-7.26 (m, 10H), 7.15-7.12 (m, 1H), 7.08-6.97 (m, 3H), 6.78 (dd, J=10.5, 6.3 Hz, 1H), 6.54 (d, J=8.4 Hz, 1H), 6.44 (dd, J=9.0, 7.8 Hz, 1H), 5.03 (d, J=9.0 Hz, 1H), 4.77 (d, J=9.3 Hz, 1H); 13C NMR (75 MHz, CDCl3) δ 176.8, 156.6 (d, J=11.0 Hz), 151.2 (dd, JC-F=248.2, 14.5 Hz), 145.6 (dd, JC-F=241.5, 13.85 Hz), 141.7, 137.4, 137.1, 131.5, 128.8, 128.8, 128.7, 128.3, 128.3, 128.1, 128.0, 124.2 (dd, J=6.4, 3.3 Hz), 123.8, 123.3, 112.4, 111.5 (dd, J=20.4, 1.6 Hz), 100.1 (d, J=22.4), 80.8, 58.9, 57.5; MS (ES+) m/z 440.2 (M+1), 462.2 (M+23).

후처리

  1. concentrationthe reaction mixture was concentrated in vacuo
  2. dissolutionre-dissolved in ethyl acetate (50 mL)
  3. extractionThe aqueous layer was extracted with ethyl acetate (6×50 mL)
  4. filtrationSome product was filtered off as a colorless precipitate
  5. washThe combined organic solution was washed with water (2×150 mL) and brine (150 mL)
  6. dry with materialdried over sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customPrecipitation from diethyl ether/hexanes

출처 및 근거

ORD 기록
ord-c354afe2c1784089b56641abc64800c2
출처 데이터셋
uspto-grants-2012_09
특허 번호
US08263606B2

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