Di-tert-butyl dicarbonate → 1-tert-butyl 2-ethyl 4-(benzyloxy)-1H-indole-1,2-dicarboxylate

HRID 2267781Notes

Reaction equation

HRID 2267781 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[NH:7][C:8]2[C:13]([CH:14]=1)=[C:12]([O:15][CH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[CH:11]=[CH:10][CH:9]=2)=[O:5])[CH3:2].[O:23](C(OC(C)(C)C)=O)[C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=O>C(OCC)(=O)C.CN(C1C=CN=CC=1)C>[CH3:2][CH2:1][O:3][C:4]([C:6]1[N:7]([C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:23])[C:8]2[C:13]([CH:14]=1)=[C:12]([O:15][CH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[CH:11]=[CH:10][CH:9]=2)=[O:5]

Participants

5

Reactant 2

HCID 90495Di-tert-butyl dicarbonateHCID 119707Ethyl 4-(phenylmethoxy)-1H-indole-2-carboxylate

Product 1

HCID 591526751-tert-butyl 2-ethyl 4-(benzyloxy)-1H-indole-1,2-dicarboxylate

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 8857Ethyl AcetateSolvent2×

Conditions

Temperature
0 °C

Procedure

4-Benzyloxy-1H-indole-2-carboxylic acid ethyl ester (50 g, 169.3 mmol) is dissolved in 500 ml of ethyl acetate and DMAP (141 mg, 3.4 mmol) is added. Then the mixture is cooled to 0° C. and BOC2O (36.9 g, 169.3 mmol), dissolved in 20 ml of ethyl acetate, is added dropwise. After completion of addition the reaction mixture is allowed to stir over night at room temperature. The mixture is washed with 1M tartaric acid and brine. The organic layers are dried over sodium sulfate and evaporated

Workup

  1. additionis added dropwise
  2. additionAfter completion of addition the reaction mixture
  3. washThe mixture is washed with 1M tartaric acid and brine
  4. dry with materialThe organic layers are dried over sodium sulfate
  5. customevaporated

Sources & evidence

ORD record
ord-5dc1249e7d244c97b4c87783533e6c1c
Source dataset
uspto-grants-2010_12
Patent number
US07858781B2

Reaction notes

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