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Trifluoroacetic acid → 2-(6-Methoxy-1,3,4,9-tetrahydro-beta-carboline-2-sulfonylmethyl)-3-methylbutyric acid

HRID 1582040
Notes
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Reaction equation

HRID 1582040 reaction equation
FC(F)(F)C(O)=O.C([O:12][C:13](=[O:37])[CH:14]([CH2:18][S:19]([N:22]1[CH2:34][CH2:33][C:32]2[C:31]3[C:26](=[CH:27][CH:28]=[C:29]([O:35][CH3:36])[CH:30]=3)[NH:25][C:24]=2[CH2:23]1)(=[O:21])=[O:20])[CH:15]([CH3:17])[CH3:16])(C)(C)C.ClCCl.CO>ClCCl>[CH3:36][O:35][C:29]1[CH:30]=[C:31]2[C:26](=[CH:27][CH:28]=1)[NH:25][C:24]1[CH2:23][N:22]([S:19]([CH2:18][CH:14]([CH:15]([CH3:17])[CH3:16])[C:13]([OH:37])=[O:12])(=[O:21])=[O:20])[CH2:34][CH2:33][C:32]2=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 6422Trifluoroacetic acidHCID 21226129Dichloromethane methanolHCID 698956642-(6-Methoxy-1,3,4,9-tetrahydro-beta-carboline-2-sulfonylmethyl)-3-methylbutyric acid tert-butyl ester

Product 1

HCID 101778142-(6-Methoxy-1,3,4,9-tetrahydro-beta-carboline-2-sulfonylmethyl)-3-methylbutyric acidYield 62%

Reagents, catalysts & solvents 1

HCID 6344
Dichloromethane
Solvent

Procedure

Trifluoroacetic acid (1 ml) was added to a solution of 2-(6-methoxy-1,3,4,9-tetrahydro-β-carboline-2-sulfonylmethyl)-3-methyl-butyric acid tert-butyl ester (237 mg) in dichloromethane (10 ml) at room temperature under nitrogen. The mixture was stirred for 2 h before being evaporated under reduced pressure. The residue was partitioned between 1M aqueous sodium hydroxide (15 ml) and diethyl ether (15 ml). The organics were extracted with 1M aqueous sodium hydroxide (15 ml). The combined aqueous portions were acidified to pH=5 with 10% citric acid and extracted with ethyl acetate (4×20 ml). The combined organics were washed with water (2×10 ml) and brine (10 ml), then dried (MgSO4), filtered and the solvent removed under reduced pressure to give, after chromatography (SiO2, 20:1 dichloromethane-methanol), the title compound (128 mg, 62%) as a white foam.

Workup

  1. custombefore being evaporated under reduced pressure
  2. customThe residue was partitioned between 1M aqueous sodium hydroxide (15 ml) and diethyl ether (15 ml)
  3. extractionThe organics were extracted with 1M aqueous sodium hydroxide (15 ml)
  4. extractionextracted with ethyl acetate (4×20 ml)
  5. washThe combined organics were washed with water (2×10 ml) and brine (10 ml)
  6. dry with materialdried (MgSO4)
  7. filtrationfiltered
  8. customthe solvent removed under reduced pressure
  9. customto give

Sources & evidence

ORD record
ord-e6dcdd1abf2e40f1a7d64572afb839b3
Source dataset
uspto-grants-2004_05
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US06734189B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes