Pivalic acid → (E)-tert-butyl 3-(4-((6-methoxy-2-(4-(trifluoromethyl)phenyl)benzo[b]thiophen-3 yl)oxy)phenyl)acrylate

HRID 632629ノート

反応式

HRID 632629 の反応式
[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]2[C:10]([O:11][C:12]3[CH:17]=[CH:16][C:15](/[CH:18]=[CH:19]/[C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])=[CH:14][CH:13]=3)=[CH:9][S:8][C:7]=2[CH:27]=1.Br[C:29]1[CH:34]=[CH:33][C:32]([C:35]([F:38])([F:37])[F:36])=[CH:31][CH:30]=1.CC(C)(C)C(O)=O.C(=O)([O-])[O-].[K+].[K+]>CC(N(C)C)=O>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]2[C:10]([O:11][C:12]3[CH:17]=[CH:16][C:15](/[CH:18]=[CH:19]/[C:20]([O:22][C:23]([CH3:24])([CH3:26])[CH3:25])=[O:21])=[CH:14][CH:13]=3)=[C:9]([C:29]3[CH:34]=[CH:33][C:32]([C:35]([F:38])([F:37])[F:36])=[CH:31][CH:30]=3)[S:8][C:7]=2[CH:27]=1

参加物

6

反応物 4

HCID 6417Pivalic acidHCID 11430Potassium CarbonateHCID 67872Benzene, 1-bromo-4-(trifluoromethyl)-HCID 86730640(E)-tert-butyl 3-(4-((6-methoxybenzo[b]thiophen-3-yl)oxy)phenyl)acrylate

生成物 1

HCID 86730641(E)-tert-butyl 3-(4-((6-methoxy-2-(4-(trifluoromethyl)phenyl)benzo[b]thiophen-3 yl)oxy)phenyl)acrylate収率 86%

試薬・触媒・溶媒 1

HCID 31374Dimethylacetamide溶媒

実験手順

To a 5 mL microwave vial, added a solution of (E)-tert-butyl 3-(4-((6-methoxybenzo[b]thiophen-3-yl)oxy)phenyl)acrylate (50 mg, 0.13 mmol) in anhydrous DMA (1.5 mL), followed by 1-bromo-4-(trifluoromethyl)benzene (35.3 mg, 0.16 mmol), chloro[2-(dicyclohexylphosphino)-3,6-dimethoxy-2′,4′,6′-tri-i-propyl-1,1′-biphenyl][2-(2-aminoethyl)phenyl]palladium(II) (BrettPhos palladacycle 1st generation, 10.4 mg, 0.013 mmol), trimethylacetic acid (40.1 mg, 0.392 mmol) and potassium carbonate (54.2 mg, 0.392 mmol). The microwave vial was scaled, purged and back-filled with nitrogen. The reaction mixture subjected to microwave irradiation for 2 h at 150° C. Upon completion the reaction was diluted with EtOAc, and washed with water and brine. The combined organic layer was dried over anhydrous MgSO4, filtered and concentrated in vacuo to give a red brown residue which was purified by column chromatography (SiO2, 0-30% EtOAc/heptane) to afford (E)-tert-butyl 3-(4-((6-methoxy-2-(4-(trifluoromethyl)phenyl)benzo[b]thiophen-3 yl)oxy)phenyl)acrylate (59.4 mg, 0.11 mmol, 86% yield). 1H NMR (400 MHz, CD3OD) δ ppm=1.42-1.61 (m, 9 H), 3.77-3.98 (m, 3 H), 6.31 (d, J=15.66 Hz, 1 H), 6.87-7.04 (m, 3 H), 7.28 (d, J=9.09 Hz, 1 H), 7.46 (d, J=2.53 Hz, 1 H), 7.47-7.57 (m, 3 H), 7.65 (d, J=8.08 Hz, 2 H), 7.89 (d, J=8.08 Hz, 2 H), LC/MS (m/z, MH+): 471.40.

後処理

  1. custompurged
  2. additionback-filled with nitrogen
  3. customirradiation for 2 h at 150° C
  4. additionUpon completion the reaction was diluted with EtOAc
  5. washwashed with water and brine
  6. dry with materialThe combined organic layer was dried over anhydrous MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo
  9. customto give a red brown residue which
  10. customwas purified by column chromatography (SiO2, 0-30% EtOAc/heptane)

出典と根拠

ORDレコード
ord-7def578f646f478795049c1c16c41766
出典データセット
uspto-grants-2016_04
特許番号
US09321746B2

反応ノート

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