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Sodium hydride → Ethyl 5-benzyloxy-1-(2-chloro-4,5-methylenedioxybenzyl)indole-2-carboxylate

HRID 618753
Notes
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Reaction equation

HRID 618753 reaction equation
[H-].[Na+].[CH2:3]([O:10][C:11]1[CH:12]=[C:13]2[C:17](=[CH:18][CH:19]=1)[NH:16][C:15]([C:20]([O:22][CH2:23][CH3:24])=[O:21])=[CH:14]2)[C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.[CH2:25]1[O:29][C:28]2[CH:30]=[C:31]([Cl:36])[C:32]([CH2:34]Cl)=[CH:33][C:27]=2[O:26]1>CN(C=O)C>[CH2:3]([O:10][C:11]1[CH:12]=[C:13]2[C:17](=[CH:18][CH:19]=1)[N:16]([CH2:34][C:32]1[CH:33]=[C:27]3[O:26][CH2:25][O:29][C:28]3=[CH:30][C:31]=1[Cl:36])[C:15]([C:20]([O:22][CH2:23][CH3:24])=[O:21])=[CH:14]2)[C:4]1[CH:5]=[CH:6][CH:7]=[CH:8][CH:9]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 901136-Chloropiperonyl chlorideHCID 95721Ethyl 5-(phenylmethoxy)-1H-indole-2-carboxylate

Product 1

HCID 15433189Ethyl 5-benzyloxy-1-(2-chloro-4,5-methylenedioxybenzyl)indole-2-carboxylateYield 50%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a stirring suspension of sodium hydride (2.03grams (hereinafter "g"), (60% in mineral oil), 50.8 millimoles (hereinafter "mmol")) in DMF (100 milliliters (hereinafter "mL")) was added ethyl 5-benzyloxyindole-2-carboxylate (10.0 g, 33.9 mmol). After 10 minutes (hereinafter "min"), 6-chloropiperonyl chloride (10.4 g, 50.8 mmol) was added. After 1 hour, the mixture was partitioned between water and ethyl acetate. The organic layer was washed with water and saturated brine, dried (MgSO4), filtered and concentrated to leave an oily pale yellow solid. The solid was recrystallized from ethanol to provide the title compound as a white solid (7.8 g, 50%). 1HNMR (400 MHz, CDCl3) d 7.49-7.33 (m, 6H), 7.19-7.08 (m, 3H), 6.87 (s, 1H), 5.86 (s, 2H), 5.78 (s, 1H), 5.77 (s, 2H), 5.11 (s, 2H), 4.33 (q, 2H), 1.36 (t, 3H).

Workup

  1. customthe mixture was partitioned between water and ethyl acetate
  2. washThe organic layer was washed with water and saturated brine
  3. dry with materialdried (MgSO4)
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customto leave an oily pale yellow solid
  7. customThe solid was recrystallized from ethanol

Sources & evidence

ORD record
ord-2a19717096534eaabe645841464d90bb
Source dataset
uspto-grants-1999_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05955492

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes