Acetyl chloride → HCID 68283860, compound

HRID 1527159Notes

Reaction equation

HRID 1527159 reaction equation
[CH2:1]([O:8][C:9]([C:11]1[C:19]2[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=2)[NH:13][CH:12]=1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H-].[Na+].[C:22](Cl)(=[O:24])[CH3:23]>C1COCC1>[CH2:1]([O:8][C:9]([C:11]1[C:19]2[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=2)[N:13]([C:22](=[O:24])[CH3:23])[CH:12]=1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 6367Acetyl chlorideHCID 24758Sodium hydrideHCID 8605861benzyl 1H-indole-3-carboxylate

Product 1

HCID 68283860HCID 68283860, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of 1H-indole-3-carboxylic acid benzyl ester (600 mg, 2.39 mmol) in THF (10 mL) at 0° C. under nitrogen was added NaH (60% in mineral oil, 191 mg, 4.78 mmol). The mixture was stirred for 20 min at 0° C., acetyl chloride (339 μl, 4.78 mmol) was added and the resulting suspension was stirred at RT for 48 h. The solvent was concentrated and the residue poured in water and extracted twice with CH2Cl2. The Combined organic layers were dried over Na2SO4, filtered and concentrated. The crude residue was purified by flash column chromatography on silica gel (c-hexane to c-hexane/EtOAc 75:25) to give the desired product as a white solid. TLC, Rf (c-hexane/EtOAc 3:1)=0.38; MS (LC-MS): 294.1 [M+H]+, 316.0 [M+Na]+; tR (HPLC conditions a): 4.69 min.

Workup

  1. stirringthe resulting suspension was stirred at RT for 48 h
  2. concentrationThe solvent was concentrated
  3. additionthe residue poured in water
  4. extractionextracted twice with CH2Cl2
  5. dry with materialThe Combined organic layers were dried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe crude residue was purified by flash column chromatography on silica gel (c-hexane to c-hexane/EtOAc 75:25)

Sources & evidence

ORD record
ord-33699b61c2d94b69b4d8084fc981b6ed
Source dataset
uspto-grants-2015_07
Patent number
US09085555B2

Reaction notes

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