2-(Dimethylamino)ethanol → 6-(2-Dimethylaminoethoxy)-2-(3-methoxy-6-pyridin-4-yl-pyridazin-4-yl)-indole-1-carboxylic acid tert-butyl ester

HRID 2426520Notes

Reaction equation

HRID 2426520 reaction equation
[C:1]([O:5][C:6]([N:8]1[C:16]2[C:11](=[CH:12][CH:13]=[C:14]([OH:17])[CH:15]=2)[CH:10]=[C:9]1[C:18]1[CH:23]=[C:22]([C:24]2[CH:29]=[CH:28][N:27]=[CH:26][CH:25]=2)[N:21]=[N:20][C:19]=1[O:30][CH3:31])=[O:7])([CH3:4])([CH3:3])[CH3:2].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[CH3:51][N:52]([CH3:56])[CH2:53][CH2:54]O.N(C(OCC)=O)=NC(OCC)=O>C1(C)C=CC=CC=1.C1COCC1>[C:1]([O:5][C:6]([N:8]1[C:16]2[C:11](=[CH:12][CH:13]=[C:14]([O:17][CH2:54][CH2:53][N:52]([CH3:56])[CH3:51])[CH:15]=2)[CH:10]=[C:9]1[C:18]1[CH:23]=[C:22]([C:24]2[CH:25]=[CH:26][N:27]=[CH:28][CH:29]=2)[N:21]=[N:20][C:19]=1[O:30][CH3:31])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 79022-(Dimethylamino)ethanolHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 1363396366-Hydroxy-2-(3-methoxy-6-pyridin-4-yl-pyridazin-4-yl)-indole-1-carboxylic acid tert-butyl ester

Product 1

HCID 671485996-(2-Dimethylaminoethoxy)-2-(3-methoxy-6-pyridin-4-yl-pyridazin-4-yl)-indole-1-carboxylic acid tert-butyl esterYield 43%

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 8028TetrahydrofuranSolvent

Procedure

100 mg 6-hydroxy-2-(3-methoxy-6-pyridin-4-yl-pyridazin-4-yl)-indole-1-carboxylic acid tert-butyl ester and 175 mg triphenylphosphine are dissolved in 7 mL toluene and 2 mL THF. After dropwise addition of 84 μL 2-dimethylaminoethanol and 123 μL diethyl azodicarboxylate, the reaction mixture is stirred at room temperature for 5 hours. The solvent is removed in vacuo and the residue is dissolved in dichloromethane. The organic phase is washed with water and the aqueous phase is extracted twice with dichloromethane. The combined organic phases are dried over MgSO4 and concentrated in vacuo. Purification by HPLC afforded 35 mg (43%) 6-(2-dimethylaminoethoxy)-2-(3-methoxy-6-pyridin-4-yl-pyridazin-4-yl)-indole-1-carboxylic acid tert-butyl ester.

Workup

  1. customThe solvent is removed in vacuo
  2. dissolutionthe residue is dissolved in dichloromethane
  3. washThe organic phase is washed with water
  4. extractionthe aqueous phase is extracted twice with dichloromethane
  5. dry with materialThe combined organic phases are dried over MgSO4
  6. concentrationconcentrated in vacuo
  7. customPurification by HPLC

Sources & evidence

ORD record
ord-b4d784bfecc94289af3563427661236a
Source dataset
uspto-grants-2011_06
Patent number
US07968546B2

Reaction notes

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