Triphenylphosphine → (+/-)-4-{1-[3,5-Difluoro-4-(4-trifluoromethyl-pyrazol-1-yl)-phenoxy]-butyl}-benzoic acid ethyl ester

HRID 537588ノート

反応式

HRID 537588 の反応式
[F:1][C:2]1[CH:3]=[C:4]([OH:18])[CH:5]=[C:6]([F:17])[C:7]=1[N:8]1[CH:12]=[C:11]([C:13]([F:16])([F:15])[F:14])[CH:10]=[N:9]1.O[CH:20]([C:24]1[CH:34]=[CH:33][C:27]([C:28]([O:30][CH2:31][CH3:32])=[O:29])=[CH:26][CH:25]=1)[CH2:21][CH2:22][CH3:23].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCCC=[N+]=[N-])=O)=NC([O-])=O>O1CCCC1>[CH2:31]([O:30][C:28](=[O:29])[C:27]1[CH:33]=[CH:34][C:24]([CH:20]([O:18][C:4]2[CH:5]=[C:6]([F:17])[C:7]([N:8]3[CH:12]=[C:11]([C:13]([F:15])([F:16])[F:14])[CH:10]=[N:9]3)=[C:2]([F:1])[CH:3]=2)[CH2:21][CH2:22][CH3:23])=[CH:25][CH:26]=1)[CH3:32]

参加物

6

反応物 4

HCID 11776TriphenylphosphineHCID 67981039Ethyl 4-(1-hydroxybutyl)benzoate2 回HCID 681573243,5-Difluoro-4-(4-trifluoromethyl-pyrazol-1-yl)-phenolHCID 86669100Diazopropyl azodicarboxylate

生成物 1

HCID 68178668(+/-)-4-{1-[3,5-Difluoro-4-(4-trifluoromethyl-pyrazol-1-yl)-phenoxy]-butyl}-benzoic acid ethyl ester収率 100.7%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

3,5-Difluoro-4-(4-trifluoromethyl-pyrazol-1-yl)-phenol (230 mg, 0.871 mmol) was combined with ethyl 4-(1-hydroxybutyl)benzoate (see Intermediate 5) (194 mg, 0.871 mmol) and dissolved in anhydrous tetrahydrofuran (4 mL). Triphenylphosphine (457 mg, 1.74 mmol) was added followed by diazopropyl azodicarboxylate (0.451 mL, 2.18 mmol). This was stirred at room temperature as a yellow solution. At 17 h. the reaction was concentrated. Purification by silica gel flash chromatography (ethyl acetate in heptane) gave impure (+/−)-4-{1-[3,5-difluoro-4-(4-trifluoromethyl-pyrazol-1-yl)-phenoxy]-butyl}-benzoic acid ethyl ester (0.411 g) as a clear oil. 1H NMR (400 MHz, CDCl3, δ): 8.06 (d, J=8.2 Hz, 2H) 7.93 (s, 1H) 7.82 (s, 1H) 7.39 (d, J=8.4 Hz, 2H) 6.54 (d, J=9.4 Hz, 2H) 5.15 (dd, J=7.6, 5.3 Hz, 1H) 4.39 (q, J=7.2 Hz, 2H) 1.96-2.10 (m, 1H) 1.77-1.91 (m, 1H) 1.19-1.61 (m, 5H) 0.98 (t, J=7.3 Hz, 3H); MS (M+1): 469.3.

後処理

  1. concentrationAt 17 h. the reaction was concentrated
  2. customPurification by silica gel flash chromatography (ethyl acetate in heptane)

出典と根拠

ORDレコード
ord-336d9f136c08470dbbb466818319aa27
出典データセット
uspto-grants-2014_10
特許番号
US08859591B2

反応ノート

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