Potassium Fluoride → 2-(4-{2-[2-(2'-Methoxy-biphenyl-4-yl)-5-methyloxazol-4-yl]-ethoxy}-phenoxy)-2-methylpropionic acid ethyl ester

HRID 398121

反応式

HRID 398121 の反応式
[CH2:1]([O:3][C:4](=[O:31])[C:5]([O:8][C:9]1[CH:14]=[CH:13][C:12]([O:15][CH2:16][CH2:17][C:18]2[N:19]=[C:20]([C:24]3[CH:29]=[CH:28][C:27](Br)=[CH:26][CH:25]=3)[O:21][C:22]=2[CH3:23])=[CH:11][CH:10]=1)([CH3:7])[CH3:6])[CH3:2].[CH3:32][O:33][C:34]1[CH:39]=[CH:38][CH:37]=[CH:36][C:35]=1B(O)O.[F-].[K+].C1(P(C2CCCCC2)C2C=CC=CC=2C2C=CC=CC=2)CCCCC1>C([O-])(=O)C.[Pd+2].C([O-])(=O)C.C(OCC)(=O)C.C1COCC1>[CH2:1]([O:3][C:4](=[O:31])[C:5]([O:8][C:9]1[CH:14]=[CH:13][C:12]([O:15][CH2:16][CH2:17][C:18]2[N:19]=[C:20]([C:24]3[CH:29]=[CH:28][C:27]([C:35]4[CH:36]=[CH:37][CH:38]=[CH:39][C:34]=4[O:33][CH3:32])=[CH:26][CH:25]=3)[O:21][C:22]=2[CH3:23])=[CH:11][CH:10]=1)([CH3:7])[CH3:6])[CH3:2]

参加物

8

反応物 4

HCID 522689Potassium FluorideHCID 27339582-Methoxyphenylboronic acidHCID 27342162-(Dicyclohexylphosphino)biphenylHCID 110273422-(4-{2-[2-(4-Bromophenyl)-5-methyloxazol-4-yl]ethoxy}phenoxy)-2-methylpropionic acid ethyl ester

生成物 1

HCID 698714712-(4-{2-[2-(2'-Methoxy-biphenyl-4-yl)-5-methyloxazol-4-yl]-ethoxy}-phenoxy)-2-methylpropionic acid ethyl ester

試薬・触媒・溶媒 3

HCID 167845palladium(II) acetate触媒HCID 8028Tetrahydrofuran溶媒HCID 8857Ethyl Acetate溶媒

実験手順

A solution of 2-(4-{2-[2-(4-bromophenyl)-5-methyloxazol-4-yl]ethoxy}phenoxy)-2-methylpropionic acid ethyl ester (300 mg, 0.614 mmol) (see Ex. 2, part B), o-methoxyphenylboronic acid (140 mg, 0.921 mmol), potassium fluoride (88.6 mg, 1.84 mmol), palladium acetate (1.3 mg, 0.14 μmol), and 2-(dicyclohexylphosphino)biphenyl (4.3 mg, 12.3 μmol) were combined under N2, to which anhydrous THF (1.23 mL) was added. The yellow mixture was heated at reflux for 12 h. After cooling to room temperature, the mixture was partitioned between Et2O (20 mL) and 1M NaOH (10 mL). The layers were separated, and the aqueous phase was back-extracted with Et2O (10 mL). Combined organic phases were dried over Na2SO4, and concentrated. The product was purified by silica gel chromatography (25 g SiO2, 1:4 ethyl acetate:hexanes) to yield 100.5 mg (32%) as an oil. Rf=0.38 in 1:4 ethyl acetate:hexanes; 1H NMR (400 MHz, CDCl3) δ7.97 (d, J=8.0 Hz, 2H), 7.57 (d, J=8.0 Hz, 2H), 7.33-7.29 (m, 2H), 7.01 (t, J=7.2 Hz, 1H), 6.97 (d, J=7.6 Hz, 1H), 6.80-6.74 (m, 4H), 4.20 (q, J=7.2 Hz, 2H), 4.17 (t, J=6.8 Hz, 2H), 3.80 (s, 3H), 2.94 (t, J=6.8 Hz, 2H), 2.34 (s, 3H), 1.50 (s, 6H), 1.24 (t, J=7.2 Hz, 3H); MS (EI) 538.2 (M+Na)+, 516.2 (M+H)+.

後処理

  1. additionwas added
  2. temperatureThe yellow mixture was heated
  3. temperatureat reflux for 12 h
  4. customthe mixture was partitioned between Et2O (20 mL) and 1M NaOH (10 mL)
  5. customThe layers were separated
  6. extractionthe aqueous phase was back-extracted with Et2O (10 mL)
  7. dry with materialCombined organic phases were dried over Na2SO4
  8. concentrationconcentrated
  9. customThe product was purified by silica gel chromatography (25 g SiO2, 1:4 ethyl acetate:hexanes)
  10. customto yield 100.5 mg (32%) as an oil

出典と根拠

ORDレコード
ord-3f89e98eb7624e7081ad10a78ec65a7b
出典データセット
uspto-grants-2003_08
特許番号
US06610696B2

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