4-Methoxy-alpha-toluenethiol → Ethyl 2-fluoro-3-((4-methoxybenzyl)thio)benzoate

HRID 522748ノート

反応式

HRID 522748 の反応式
Br[C:2]1[C:3]([F:13])=[C:4]([CH:10]=[CH:11][CH:12]=1)[C:5]([O:7][CH2:8][CH3:9])=[O:6].[CH3:14][O:15][C:16]1[CH:21]=[CH:20][C:19]([CH2:22][SH:23])=[CH:18][CH:17]=1.C(N(C(C)C)CC)(C)C>O1CCOCC1.CCCCCC.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2>[F:13][C:3]1[C:2]([S:23][CH2:22][C:19]2[CH:20]=[CH:21][C:16]([O:15][CH3:14])=[CH:17][CH:18]=2)=[CH:12][CH:11]=[CH:10][C:4]=1[C:5]([O:7][CH2:8][CH3:9])=[O:6]

参加物

8

反応物 3

HCID 804074-Methoxy-alpha-toluenethiolHCID 81531DiisopropylethylamineHCID 17832538Ethyl 3-bromo-2-fluorobenzoate

生成物 1

HCID 66764575Ethyl 2-fluoro-3-((4-methoxybenzyl)thio)benzoate収率 88%

試薬・触媒・溶媒 4

HCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)触媒HCID 9811564Bis(dibenzylideneacetone)palladium触媒HCID 8058Hexane溶媒HCID 312751,4-Dioxane溶媒

反応条件

温度
90 °C

実験手順

1,4-dioxane (250 mL) was degassed by purging with N2 gas for 30 min and to this, were added a solution of compound 2 (13.2 g, 53.4 mmol) in 1,4-dioxane (50 mL; degassed), (4-methoxyphenyl)methanethiol (PMBSH) (8.2 g, 53.4 mmol), xantphos (1.54 g, 2.66 mmol), diisopropyl ethyl amine (19.6 mL, 106.8 mmol) and Pd2(dba)3 (1.22 g, 1.33 mmol) at RT. The reaction mixture was heated to 90° C. and stirred for 2 h. The reaction was monitored by TLC; after completion of the reaction, the reaction mixture was diluted with hexane (450 mL) and stirred at RT for 15 min. The resultant solution was filtered through celite and washed with hexane (100 mL). The filtrate was washed water (250 mL) dried over Na2SO4, filtered and concentrated under reduced pressure to obtain the crude. This was purified by silica gel column chromatography using 3-4% EtOAc/Hexanes to afford compound 3 (15 g, 88%) as pale yellow solid. 1H NMR (500 MHz, CDCl3): δ 7.78-7.74 (m, 1H), 7.43-7.39 (m, 1H), 7.19 (d, J=8.0 Hz, 2H), 7.07-7.04 (m, 1H), 6.80 (d, J=8.0 Hz, 2H), 4.41 (q, J=7.2 Hz, 2H), 4.08 (s, 2H), 3.78 (s, 3H), 1.41 (t, J=7.2 Hz, 3H). LC-MS (ESI): 89.7%; m/z 318.9 (M−H+); (column: X Select CSH C-18, 50×3.0 mm, 3.5 μm); RT 4.22 min; 5 mM NH4OAc: ACN; 0.8 mL/min).

後処理

  1. custom1,4-dioxane (250 mL) was degassed
  2. customby purging with N2 gas for 30 min
  3. customafter completion of the reaction
  4. stirringstirred at RT for 15 min
  5. filtrationThe resultant solution was filtered through celite
  6. washwashed with hexane (100 mL)
  7. washThe filtrate was washed water (250 mL)
  8. dry with materialdried over Na2SO4
  9. filtrationfiltered
  10. concentrationconcentrated under reduced pressure
  11. customto obtain the crude
  12. customThis was purified by silica gel column chromatography

出典と根拠

ORDレコード
ord-119480f1151e48d183adb6be9e7e1f45
出典データセット
uspto-grants-2016_05
特許番号
US09334261B2

反応ノート

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