1-(Chloromethoxy)-2-methoxyethane → 1-[3-(2-methoxy-ethoxymethyl)-4-oxo-3,4,6,7,8,9-hexahydro-benzo[g]quinazolin-2-yl]-1H-pyrazole-4-carboxylic acid ethyl ester

HRID 1428860Notes

Reaction equation

HRID 1428860 reaction equation
CCN(C(C)C)C(C)C.[CH2:10]([O:12][C:13]([C:15]1[CH:16]=[N:17][N:18]([C:20]2[NH:29][C:28](=[O:30])[C:27]3[C:22](=[CH:23][C:24]4[CH2:34][CH2:33][CH2:32][CH2:31][C:25]=4[CH:26]=3)[N:21]=2)[CH:19]=1)=[O:14])[CH3:11].C(OC(C1C=NN(C2NC(=O)C3C4CCCCC=4C=CC=3N=2)C=1)=O)C.Cl[CH2:61][O:62][CH2:63][CH2:64][O:65][CH3:66]>C1COCC1.CCOC(C)=O>[CH2:10]([O:12][C:13]([C:15]1[CH:16]=[N:17][N:18]([C:20]2[N:29]([CH2:61][O:62][CH2:63][CH2:64][O:65][CH3:66])[C:28](=[O:30])[C:27]3[C:22](=[CH:23][C:24]4[CH2:34][CH2:33][CH2:32][CH2:31][C:25]=4[CH:26]=3)[N:21]=2)[CH:19]=1)=[O:14])[CH3:11]

Participants

7

Reactant 4

HCID 775901-(Chloromethoxy)-2-methoxyethaneHCID 81531DiisopropylethylamineHCID 1363371811-(4-oxo-3,4,6,7,8,9-hexahydro-benzo[g]quinazolin-2-yl)-1H-pyrazole-4-carboxylic acid ethyl esterHCID 1363371821-(1-oxo-1,2,7,8,9,10-hexahydro-benzo[f]quinazolin-3-yl)-1H-pyrazole-4-carboxylic acid ethyl ester

Product 1

HCID 684848471-[3-(2-methoxy-ethoxymethyl)-4-oxo-3,4,6,7,8,9-hexahydro-benzo[g]quinazolin-2-yl]-1H-pyrazole-4-carboxylic acid ethyl esterYield 41%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

DIEA (0.76 mL, 4.4 mmol) was added to a 2:1 mixture of 1-(4-oxo-3,4,6,7,8,9-hexahydro-benzo[g]quinazolin-2-yl)-1H-pyrazole-4-carboxylic acid ethyl ester and 1-(1-oxo-1,2,7,8,9,10-hexahydro-benzo[f]quinazolin-3-yl)-1H-pyrazole-4-carboxylic acid ethyl ester (0.500 g, 1.478 mmol) in THF (7.4 mL), followed by 1-chloromethoxy-2-methoxy-ethane (0.186 mL, 1.63 mmol). The reaction mixture was stirred at room temperature for 18 h, diluted with EtOAc (40 mL), and washed with water (30 mL). The aqueous layer was extracted with EtOAc (2×30 mL) and the combined organic layers were washed with brine (40 mL), dried (MgSO4), and concentrated. The residue was purified by FCC (5-60% EtOAc/hexanes) to yield 1-[3-(2-methoxy-ethoxymethyl)-4-oxo-3,4,6,7,8,9-hexahydro-benzo[g]quinazolin-2-yl]-1H-pyrazole-4-carboxylic acid ethyl ester (0.257 g, 41% yield) and the titled compound (69.0 mg, 11% yield).

Workup

  1. washwashed with water (30 mL)
  2. extractionThe aqueous layer was extracted with EtOAc (2×30 mL)
  3. washthe combined organic layers were washed with brine (40 mL)
  4. dry with materialdried (MgSO4)
  5. concentrationconcentrated
  6. customThe residue was purified by FCC (5-60% EtOAc/hexanes)

Sources & evidence

ORD record
ord-0b8bd14f598a407f94acd25b064ebf3a
Source dataset
uspto-grants-2015_01
Patent number
US08937078B2

Reaction notes

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