Lithium hydroxide, monohydrate → 4-(3-(Benzyloxycarbonylamino)-2-methylphenyl)-7-(2-methoxyethoxy)-9H-pyrido[3,4-b]indole-1-carboxylic acid

HRID 2361274Notes

Reaction equation

HRID 2361274 reaction equation
[CH2:1]([O:8][C:9]([NH:11][C:12]1[C:13]([CH3:41])=[C:14]([C:18]2[C:30]3[C:29]4[C:24](=[CH:25][C:26]([O:31][CH2:32][CH2:33][O:34][CH3:35])=[CH:27][CH:28]=4)[NH:23][C:22]=3[C:21]([C:36]([O:38]CC)=[O:37])=[N:20][CH:19]=2)[CH:15]=[CH:16][CH:17]=1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.O.[OH-].[Li+]>O1CCCC1.CO.O>[CH2:1]([O:8][C:9]([NH:11][C:12]1[C:13]([CH3:41])=[C:14]([C:18]2[C:30]3[C:29]4[C:24](=[CH:25][C:26]([O:31][CH2:32][CH2:33][O:34][CH3:35])=[CH:27][CH:28]=4)[NH:23][C:22]=3[C:21]([C:36]([OH:38])=[O:37])=[N:20][CH:19]=2)[CH:15]=[CH:16][CH:17]=1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 2

HCID 168937Lithium hydroxide, monohydrateHCID 67994870Ethyl 4-(3-(benzyloxycarbonylamino)-2-methylphenyl)-7-(2-methoxyethoxy)-9H-pyrido[3,4-b]indole-1-carboxylate

Product 1

HCID 706509684-(3-(Benzyloxycarbonylamino)-2-methylphenyl)-7-(2-methoxyethoxy)-9H-pyrido[3,4-b]indole-1-carboxylic acidYield 83.5%

Reagents, catalysts & solvents 3

HCID 887MethanolSolventHCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a solution of ethyl 4-(3-(benzyloxycarbonylamino)-2-methylphenyl)-7-(2-methoxyethoxy)-9H-pyrido[3,4-b]indole-1-carboxylate (0.299 g, 0.540 mmol) in tetrahydrofuran (15 mL) and methanol (5 mL) at room temperature was added a solution of lithium hydroxide hydrate (0.091 g, 2.160 mmol) in water (2 mL). The resulting mixture was stirred at room temperature for 1.5 hr, and then concentrated under vacuum to almost dryness. To the residue was added water (8 mL), and the mixture was neutralized with 1N HCl to pH 4-5. The insoluble product (0.237 g, 0.451 mmol, 83% yield) was collected as a beige solid by suction filtration and dried over Drierite under vacuum.

Workup

  1. concentrationconcentrated under vacuum to almost dryness
  2. additionTo the residue was added water (8 mL)

Sources & evidence

ORD record
ord-8b88b0e91ce84db2b869a6533fa7c3dd
Source dataset
uspto-grants-2014_04
Patent number
US08685969B2

Reaction notes

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