Diisobutylaluminum hydride → HCID 54670140, compound

HRID 449264Notes

Reaction equation

HRID 449264 reaction equation
[F:1][C:2]1[CH:11]=[C:10]([C:12]2[N:17]=[C:16]3[N:18]([CH2:21][C:22]4[CH:23]=[C:24]5[C:29](=[CH:30][CH:31]=4)[N:28]=[CH:27][CH:26]=[CH:25]5)[N:19]=[N:20][C:15]3=[CH:14][CH:13]=2)[CH:9]=[CH:8][C:3]=1[C:4](OC)=[O:5].CC(C[AlH]CC(C)C)C>C1COCC1>[F:1][C:2]1[CH:11]=[C:10]([C:12]2[N:17]=[C:16]3[N:18]([CH2:21][C:22]4[CH:23]=[C:24]5[C:29](=[CH:30][CH:31]=4)[N:28]=[CH:27][CH:26]=[CH:25]5)[N:19]=[N:20][C:15]3=[CH:14][CH:13]=2)[CH:9]=[CH:8][C:3]=1[CH2:4][OH:5]

Participants

4

Reactant 2

HCID 14487Diisobutylaluminum hydrideHCID 54670237HCID 54670237, compound

Product 1

HCID 54670140HCID 54670140, compoundYield 25%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of Example 12 (0.130 g, 0.314 mmol) in THF (1.3 ml) cooled to 0° C., DIBAL-H (25% in toluene, 0.84 ml, 1.25 mmol) was added stirred at RT for 3 h. The reaction mixture was poured in ice-cold water and extracted with ethyl acetate, washed with brine, dried over sodium sulphate and concentrated. The crude product was purified by column chromatography with methanol:dichloromethane to afford the title compound as pale yellow solid (0.030 g, 25%). M.P.: 202-204° C. 1H-NMR (δ ppm, DMSO-d6, 400 MHz): 8.88 (dd, J=4.1, 1.6 Hz, 1H), 8.67 (d, J=8.7 Hz, 1H), 8.38 (d, J=8.4 Hz, 1H), 8.18 (d, J=8.7 Hz, 1H), 8.12 (dd, J=8.0, 1.5 Hz, 1H), 8.04 (m, 3H), 7.83 (dd, J=8.7, 1.9 Hz, 1H), 7.65 (t, J=7.9 Hz, 1H), 7.53 (dd, J=8.3, 4.2 Hz, 1H), 6.22 (s, 2H), 5.41 (t, J=5.8 Hz, 1H), 4.62 (d, J=5.6 Hz, 2H). MS (m/z): 386.01 (M++1).

Workup

  1. additionThe reaction mixture was poured in ice-cold water
  2. extractionextracted with ethyl acetate
  3. washwashed with brine
  4. dry with materialdried over sodium sulphate
  5. concentrationconcentrated
  6. customThe crude product was purified by column chromatography with methanol

Sources & evidence

ORD record
ord-8e80c229eb5b43f8b1eda0394e2f5db1
Source dataset
uspto-grants-2013_07
Patent number
US08481739B2

Reaction notes

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