Ammonium Chloride → 3-(3-Chloro-8-dimethylaminomethyl-naphthalen-2-yl)-4-(1-methyl-1H-indol-3-yl)-pyrrole-2,5-dione

HRID 505239Notes

Reaction equation

HRID 505239 reaction equation
CC(C)([O-])C.[K+].CO[C:9](=[O:22])[C:10]([C:12]1[C:20]2[C:15](=[CH:16][CH:17]=[CH:18][CH:19]=2)[N:14]([CH3:21])[CH:13]=1)=O.[Cl:23][C:24]1[C:25]([CH2:38][C:39]([NH2:41])=[O:40])=[CH:26][C:27]2[C:32]([CH:33]=1)=[CH:31][CH:30]=[CH:29][C:28]=2[CH2:34][N:35]([CH3:37])[CH3:36].[NH4+].[Cl-]>O1CCCC1.CCOC(C)=O>[Cl:23][C:24]1[C:25]([C:38]2[C:39](=[O:40])[NH:41][C:9](=[O:22])[C:10]=2[C:12]2[C:20]3[C:15](=[CH:16][CH:17]=[CH:18][CH:19]=3)[N:14]([CH3:21])[CH:13]=2)=[CH:26][C:27]2[C:32]([CH:33]=1)=[CH:31][CH:30]=[CH:29][C:28]=2[CH2:34][N:35]([CH3:36])[CH3:37]

Participants

7

Reactant 4

HCID 25517Ammonium ChlorideHCID 44536752-(1-Methyl-1H-indol-3-YL)-2-oxoacetic acid methyl esterHCID 23665647Potassium tert-butoxideHCID 668825502-(3-Chloro-8-dimethylaminomethyl-naphthalen-2-yl)-acetamide

Product 1

HCID 594297073-(3-Chloro-8-dimethylaminomethyl-naphthalen-2-yl)-4-(1-methyl-1H-indol-3-yl)-pyrrole-2,5-dioneYield 12.7%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

Potassium tert-butoxide (1.0 M in THF, 0.26 ml, 0.26 mmol, 3.0 equiv) was added at room temperature under an atmosphere of argon to a solution of (1-methyl-1H-indol-3-yl)-oxo-acetic acid methyl ester (24 mg, 0.11 mmol, 1.3 equiv) and of crude 2-(3-chloro-8-dimethylaminomethyl-naphthalen-2-yl)-acetamide (24 mg) in anhydrous tetrahydrofuran (2.5 ml, dried over molecular sieves). The reaction mixture was stirred for 1 hour at room temperature. It was then diluted with EtOAc and poured into a saturated aqueous NH4Cl solution. After three extractions with EtOAc, the combined organic layers were dried over Na2SO4, filtered and concentrated in vacuo. Purification of the residue via preparative HPLC afforded the title compound (4.9 mg, 4% for two steps) as its trifluoroacetate salt. 1H NMR (400 MHz, d6-DMSO): δ=11.20 (s, 1H), 8.56 (s, 1H), 8.15 (s, 1H), 8.02 (s, 1H), 8.01-7.92 (m, 1H), 7.80-7.70 (m, 1H), 7.62-7.57 (m, 1H), 7.42 (d, J=8.1 Hz, 1H), 7.00 (t, J=7.9 Hz, 1H), 6.45 (t, J=7.5 Hz, 1H), 6.23 (d, J=8.0 Hz, 1H), 4.85-4.65 (br d, 2H), 3.87 (s, 3H), 2,85 (br s, 3H), 2.76 (br s, 3H). MS (ES+): 444 (M+H)+.

Workup

  1. extractionAfter three extractions with EtOAc
  2. dry with materialthe combined organic layers were dried over Na2SO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customPurification of the residue via preparative HPLC

Sources & evidence

ORD record
ord-27fe667cfad646bbb480f712b9a67b64
Source dataset
uspto-grants-2010_08
Patent number
US07781438B2

Reaction notes

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