Lithium Hydroxide → HCID 57559121, compound

HRID 37935Notes

Reaction equation

HRID 37935 reaction equation
[CH2:1]1[C:14]2[C:13]3[CH:12]=[CH:11][CH:10]=[CH:9][C:8]=3[NH:7][C:6]=2[C:5]([C:15]([O:17][CH2:18][CH3:19])=[O:16])=[CH:4][NH:3][CH:2]1[C:20]([O:22]CC)=[O:21].[Li+].[OH-]>CO>[CH2:18]([O:17][C:15]([C:5]1[C:6]2[NH:7][C:8]3[CH:9]=[CH:10][CH:11]=[CH:12][C:13]=3[C:14]=2[CH2:1][CH:2]([C:20]([OH:22])=[O:21])[NH:3][CH:4]=1)=[O:16])[CH3:19]

Participants

4

Reactant 2

HCID 3939Lithium HydroxideHCID 57559151HCID 57559151, compound

Product 1

HCID 57559121HCID 57559121, compoundYield 68.4%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Conditions

Temperature
20 °C

Procedure

To a suspension of diethyl 1,2,3,6-tetrahydroazepino[4,5-b]indole-2,5-dicarboxylate (0.48 g, 1.46 mmol) in MeOH (6 mL) was added 4 N aqueous LiOH (1 mL) and the suspension was stirred for 2 hours at 20° C. Solvent was removed and the crude was dissolved in water (50 mL). The aqueous solution was then extracted with EtOAc (3×30 mL) and acidified with HOAc. Precipitate appeared and were collected by filtration and washed with water and EtOAc, then dried under high vacuum to give the title compound (300 mg); 1H-NMR (MeOH-d4): δ 8.06 (1H, s), 7.54 (1H, dd), 7.44 (1H, dd), 7.12 (2H, m), 4.43 (3H, m), 3.61 (1H, d), 3.41 (1H, m), 1.49 (3H, t); MS (ES): 301 (MH+).

Workup

  1. customSolvent was removed
  2. dissolutionthe crude was dissolved in water (50 mL)
  3. extractionThe aqueous solution was then extracted with EtOAc (3×30 mL)
  4. filtrationwere collected by filtration
  5. washwashed with water and EtOAc
  6. customdried under high vacuum

Sources & evidence

ORD record
ord-1c5c23e31eda425ba9a83e6d7bd0d11f
Source dataset
uspto-grants-2013_09
Patent number
US08524704B2

Reaction notes

Loading…