Sodium hydride → 6-Bromo-4-methyl-2-(2-trimethylsilanyl-ethoxymethyl)-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one

HRID 519201Notes

Reaction equation

HRID 519201 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]2[C:13](=[CH:14][CH:15]=1)[O:12][CH2:11][C:10]1[N:5]2[CH:6]([CH3:17])[C:7](=[O:16])[NH:8][N:9]=1.[H-].[Na+].Cl[CH2:21][O:22][CH2:23][CH2:24][Si:25]([CH3:28])([CH3:27])[CH3:26]>CN(C=O)C.O>[Br:1][C:2]1[CH:3]=[C:4]2[C:13](=[CH:14][CH:15]=1)[O:12][CH2:11][C:10]1[N:5]2[CH:6]([CH3:17])[C:7](=[O:16])[N:8]([CH2:21][O:22][CH2:23][CH2:24][Si:25]([CH3:28])([CH3:27])[CH3:26])[N:9]=1

Participants

6

Reactant 3

HCID 24758Sodium hydrideHCID 27242712-Chloromethyl 2-(trimethylsilyl)ethyl etherHCID 867273756-Bromo-4-methyl-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one

Product 1

HCID 867274626-Bromo-4-methyl-2-(2-trimethylsilanyl-ethoxymethyl)-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-oneYield 70%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
25 °C

Procedure

A solution of 6-bromo-4-methyl-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one (4.0 g, 13.5 mmol) in anhydrous DMF (20 mL) was stirred at 0° C. Sodium hydride (60% in mineral oil, 0.8 g, 20.3 mmol) was added portion-wise and the reaction mixture was stirred at 0° C. for 0.5 h. (2-(Chloromethoxy)ethyl)trimethylsilane (3.4 g, 20.3 mmol) was added to the solution dropwise and the reaction mixture was stirred at 25° C. for 3 h. The reaction mixture was diluted with water (100 mL) and extracted with EtOAc (3×30 mL). The combined organic layer was concentrated in vacuo, washed with brine (3×30 mL), dried over anhydrous Na2SO4, filtered and concentrated to give the crude product, which was purified by chromatography on silica gel (eluting with 1% EtOAc in petroleum ether) to give 6-bromo-4-methyl-2-(2-trimethylsilanyl-ethoxymethyl)-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one (4 g, 70%) as a yellow solid. 1H NMR (CDCl3, 400 MHz): δ 7.08 (dd, J=8.4 Hz, J=2.0 Hz, 1H), 7.01 (d, J=2.0 Hz, 1H), 6.86 (d, J=8.4 Hz, 1H), 5.08 (d, J=10.0 Hz, 2H), 4.67 (m, 1H), 4.6 (d, J=12.8 Hz, 2H), 3.65 (t, J=8.4 Hz, 2H), 1.47 (d, J=6.8 Hz, 3H), 0.95 (t, J=8.4 Hz, 2H), 0.00 (s, 9H).

Workup

  1. additionwas added to the solution dropwise
  2. extractionextracted with EtOAc (3×30 mL)
  3. concentrationThe combined organic layer was concentrated in vacuo
  4. washwashed with brine (3×30 mL)
  5. dry with materialdried over anhydrous Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customto give the crude product, which
  9. customwas purified by chromatography on silica gel (eluting with 1% EtOAc in petroleum ether)

Sources & evidence

ORD record
ord-7dbf1348b17b4772bc107a1598d91eb8
Source dataset
uspto-grants-2015_08
Patent number
US09115151B2

Reaction notes

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