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Hydrochloric Acid → 2-[1-(2,1,3-Benzoxadiazol-5-ylmethyl)-6-methyl-7-oxo-4-(p-tolyl)pyrrolo[2,3-c]pyridin-5-yl]-2-tert-butoxy-acetic acid

HRID 1473211
Notes
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Reaction equation

HRID 1473211 reaction equation
[N:1]1[O:2][N:3]=[C:4]2[CH:9]=[C:8]([CH2:10][N:11]3[C:15]4[C:16](=[O:38])[N:17]([CH3:37])[C:18]([CH:27]([O:32][C:33]([CH3:36])([CH3:35])[CH3:34])[C:28]([O:30]C)=[O:29])=[C:19]([C:20]5[CH:25]=[CH:24][C:23]([CH3:26])=[CH:22][CH:21]=5)[C:14]=4[CH:13]=[CH:12]3)[CH:7]=[CH:6][C:5]=12.[Li+].[OH-].Cl>O1CCCC1.CO>[N:1]1[O:2][N:3]=[C:4]2[CH:9]=[C:8]([CH2:10][N:11]3[C:15]4[C:16](=[O:38])[N:17]([CH3:37])[C:18]([CH:27]([O:32][C:33]([CH3:34])([CH3:36])[CH3:35])[C:28]([OH:30])=[O:29])=[C:19]([C:20]5[CH:21]=[CH:22][C:23]([CH3:26])=[CH:24][CH:25]=5)[C:14]=4[CH:13]=[CH:12]3)[CH:7]=[CH:6][C:5]=12
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 3939Lithium HydroxideHCID 89473336methyl 2-(1-(benzo[c][1,2,5]oxadiazol-5-ylmethyl)-6-methyl-7-oxo-4-(p-tolyl)-6,7-dihydro-1H-pyrrolo[2,3-c]pyridin-5-yl)-2-(tert-butoxy)acetate

Product 1

HCID 715387522-[1-(2,1,3-Benzoxadiazol-5-ylmethyl)-6-methyl-7-oxo-4-(p-tolyl)pyrrolo[2,3-c]pyridin-5-yl]-2-tert-butoxy-acetic acid

Reagents, catalysts & solvents 2

HCID 887
Methanol
Solvent
HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
70 °C

Procedure

A mixture of the crude methyl 2-(1-(benzo[c][1,2,5]oxadiazol-5-ylmethyl)-6-methyl-7-oxo-4-(p-tolyl)-6,7-dihydro-1H-pyrrolo[2,3-c]pyridin-5-yl)-2-(tert-butoxy)acetate in Tetrahydrofuran (THF) (1 mL) and Methanol (1 mL) was treated with 2M LiOH (1 mL, 2.000 mmol) and then heated to 70° C. for one hour. The mixture was cooled to 0° C., adjusted to pH <2 with 1N HCl and then extracted with ethyl acetate. The combined extracts were washed with brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by reverse phase chromatography (10-90% MeCN/H2O-0.1% TFA, 12 min.) to give the title compound. 1H NMR (400 MHz, CHLOROFORM-d) ppm 7.77-7.85 (m, 1H) 7.52-7.59 (m, 1H) 7.41-7.49 (m, 2H) 7.36-7.41 (m, 1H) 7.29-7.34 (m, 2H) 7.05-7.13 (m, 1H) 6.09-6.19 (m, 1H) 5.87-6.02 (m, 2H) 5.46-5.52 (m, 1H) 3.66 (s, 3H) 2.45 (s, 3H) 1.00 (s, 9H); LCMS (m/z) ES+=501 (M+1).

Workup

  1. temperatureThe mixture was cooled to 0° C.
  2. extractionextracted with ethyl acetate
  3. washThe combined extracts were washed with brine
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was purified by reverse phase chromatography (10-90% MeCN/H2O-0.1% TFA, 12 min.)

Sources & evidence

ORD record
ord-b6a0ca1962a04bcf941dfac2632ec0f7
Source dataset
uspto-grants-2015_04
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09012642B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes