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Lithium hydroxide, monohydrate → HCID 53629692, compound

HRID 1990042
Notes
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Reaction equation

HRID 1990042 reaction equation
O.[OH-].[Li+].CC([Si](C)(C)[O:9][C:10]1[CH:11]=[C:12]([CH:23]=[C:24]([O:26][C@@H:27]([CH3:37])[CH2:28][O:29][Si:30]([C:33]([CH3:36])([CH3:35])[CH3:34])([CH3:32])[CH3:31])[CH:25]=1)[C:13]([NH:15][C:16]1[CH:21]=[N:20][C:19]([CH3:22])=[CH:18][N:17]=1)=[O:14])(C)C>O.C1COCC1>[CH3:34][C:33]([Si:30]([CH3:31])([CH3:32])[O:29][CH2:28][C@@H:27]([O:26][C:24]1[CH:23]=[C:12]([CH:11]=[C:10]([OH:9])[CH:25]=1)[C:13]([NH:15][C:16]1[CH:21]=[N:20][C:19]([CH3:22])=[CH:18][N:17]=1)=[O:14])[CH3:37])([CH3:35])[CH3:36]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 2

HCID 168937Lithium hydroxide, monohydrateHCID 536296933-{[(1,1-dimethylethyl)(dimethyl)silyl]oxy}-5-[((1S)-2-{[(1,1-dimethylethyl)(dimethyl)silyl]oxy}-1-methylethyl)oxy]-N-(5-methylpyrazin-2-yl)benzamide

Product 1

HCID 53629692HCID 53629692, compoundYield 0.1%

Reagents, catalysts & solvents 2

HCID 962WaterSolvent
HCID 8028
Tetrahydrofuran
Solvent

Procedure

Lithium hydroxide monohydrate (0.38 g, 9.12 mol) in water (20 mL) was added to a solution of 3-{[(1,1-dimethylethyl)(dimethyl)silyl]oxy}-5-[((1S)-2-{[(1,1-dimethylethyl)(dimethyl)silyl]oxy}-1-methylethyl)oxy]-N-(5-methylpyrazin-2-yl)benzamide (1.94 g, 3.65 mol) in THF (40 mL) and stirred at RT for 20 hours. The THF was removed in vacuo and the aqueous layer was adjusted to pH7. Ethyl acetate (50 mL) and water (50 mL) were added then the aqueous layer re-extracted into ethyl acetate (50 mL) and the combined organics washed with water (50 mL), brine (50 mL), dried (MgSO4), filtered and reduced in vacuo. The crude material was chromatographed on silica, eluting with 20-50% ethyl acetate in isohexane, to give the desired material as a white solid (0.8 g). 1H NMR δ (CDCl3): 0.04 (s, 3H), 0.08 (s, 3H), 0.87 (s, 9H), 1.30 (d, 3H), 2.56 (s, 3H), 3.65-3.81 (m, 2H), 4.46-4.51 (m, 1H), 5.63 (s, 1H), 6.63 (t, 1H), 6.98 (t, 1H), 7.04 (t, 1H), 8.15 (s, 1H), 8.41 (s, 1H), 9.57 (s, 1H); m/z 418 (M+H)+

Workup

  1. customThe THF was removed in vacuo
  2. additionEthyl acetate (50 mL) and water (50 mL) were added
  3. extractionthe aqueous layer re-extracted into ethyl acetate (50 mL)
  4. washthe combined organics washed with water (50 mL), brine (50 mL)
  5. dry with materialdried (MgSO4)
  6. filtrationfiltered
  7. customThe crude material was chromatographed on silica
  8. washeluting with 20-50% ethyl acetate in isohexane

Sources & evidence

ORD record
ord-efbc0b5f4c8946e28eb5514cdd90ffed
Source dataset
uspto-grants-2010_01
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07642263B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes