Sodium sulfate decahydrate → HCID 68696056, compound

HRID 644062Notes

Reaction equation

HRID 644062 reaction equation
[H-].[Al+3].[Li+].[H-].[H-].[H-].C([O:9][C:10]([C:12]1[O:16][C:15]([C:17]2[C:25]3[C:20](=[C:21]([O:26][CH3:27])[CH:22]=[CH:23][CH:24]=3)[N:19]([CH2:28][CH:29]3[CH2:34][CH2:33][CH2:32][CH2:31][CH2:30]3)[CH:18]=2)=[N:14][C:13]=1[CH3:35])=O)C.C1(CN2C3C(=CC=CC=3OC)C(C3OC=C(C)N=3)=C2)CCCCC1.O.O.O.O.O.O.O.O.O.O.S([O-])([O-])(=O)=O.[Na+].[Na+]>O1CCCC1.C(OCC)C>[CH:29]1([CH2:28][N:19]2[C:20]3[C:25](=[CH:24][CH:23]=[CH:22][C:21]=3[O:26][CH3:27])[C:17]([C:15]3[O:16][C:12]([CH2:10][OH:9])=[C:13]([CH3:35])[N:14]=3)=[CH:18]2)[CH2:34][CH2:33][CH2:32][CH2:31][CH2:30]1

Participants

7

Reactant 4

HCID 62649Sodium sulfate decahydrateHCID 21226445Aluminium lithium hydrideHCID 68694359HCID 68694359, compoundHCID 68699979HCID 68699979, compound

Product 1

HCID 68696056HCID 68696056, compound

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

Lithium aluminum hydride (1M solution in diethyl ether; 5.8 ml, 5.8 mmol) was added dropwise to a mixture of 2-(1-cyclohexylmethyl-7-methoxy-1H-indol-3-yl)-4-methyl-oxazole-5-carboxylic acid ethyl ester and 1-cyclohexylmethyl-7-methoxy-3-(4-methyl-oxazol-2-yl)-1H-indole (1171 mg) dissolved in tetrahydrofuran (20 ml) under ice-methanol cooling. The resulting mixture was stirred for 20 minutes at 0° C., then diluted with diethyl ether (40 ml). Excess sodium sulfate decahydrate was added and the resulting mixture was stirred at room temperature for 18 h. The mixture was filtered through a pad of dicalite, washing with diethyl ether (100 ml) and the filtrate concentrated in vacuo. The residue was purified by flash column chromatography eluting with 50% (v/v) ethyl acetate in n-heptane to afford [2-(1-cyclohexylmethyl-7-methoxy-1H-indol-3-yl)4-methyl-oxazol-5-yl]-methanol as a white solid (774 mg). Methane sulfonyl chloride (281 mg, 2.45 mmol) was added dropwise to a solution of [2-(1-cyclohexylmethyl-7-methoxy-1H-indol-3-yl)-4-methyl-oxazol-5-yl]-methanol (724 mg, 2.04 mmol) dissolved in dichloromethane (40 ml) at −78° C. under nitrogen. Triethylamine (269 mg, 2.66 mmol) was added dropwise and the mixture allowed to warm to room temperature with stirring for 2 h. The mixture was then diluted with dichloromethane (100 ml), washed with saturated sodium carbonate solution (2×100 ml) and brine (100 ml). The organic extracts were dried over magnesium sulfate then concentrated in vacuo. A mixture of the resulting residue (100 mg, 0.23 mmol), diethylamine (169 mg, 2.30 mmol) and tetrahydrofuran (2 ml) was subjected to microwave irradiation at 150° C. for 15 minutes. The resulting mixture was concentrated in vacuo and purified by flash column chromatography, eluting with 2% ammonia in methanol/dichloromethane in 1:49 ratio, to afford a brown gum. The gum was dissolved in dichloromethane (0.5 ml), then hydrogen chloride (1M solution in diethyl ether; 0.5 ml) was added and the mixture concentrated in vacuo to afford the title compound as a 1:1 hydrochloride salt (32 mg). 1H NMR (400 MHz, CD3OD) δ 0.85-1.38 (6H, m), 1.46 (6H, t, J 7.5), 1.55-1.78 (4H, m), 1.88 (1H, m), 2.39 (3H, s), 3.34 (4H, q, J 7.6), 3.98 (3H, s), 4.34 (2H, d, J 6.9), 4.65 (2H, s), 6.88 (1H, d, J 8.2), 7.23 (1H, t, J 8.0), 7.74 (1H, d, J 8.0), 8.00 (1H, s).

Workup

  1. stirringthe resulting mixture was stirred at room temperature for 18 h
  2. filtrationThe mixture was filtered through a pad of dicalite
  3. washwashing with diethyl ether (100 ml)
  4. concentrationthe filtrate concentrated in vacuo
  5. customThe residue was purified by flash column chromatography
  6. washeluting with 50% (v/v) ethyl acetate in n-heptane

Sources & evidence

ORD record
ord-9967eaa508a04e508566746d4bb776db
Source dataset
uspto-grants-2010_04
Patent number
US07700634B2

Reaction notes

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