Methyl iodide → (S)-tert-butyl (1-((4,6-dimethyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan-2-yl)(methyl)carbamate

HRID 1398463Notes

Reaction equation

HRID 1398463 reaction equation
[CH3:1][C:2]1[N:3]=[CH:4][CH:5]=[C:6]2[C:11]=1[C:10](=[O:12])[N:9]([CH3:13])[C:8]1[CH:14]=[C:15]([O:18][CH2:19][C@@H:20]([NH:25][C:26](=[O:32])[O:27][C:28]([CH3:31])([CH3:30])[CH3:29])[CH2:21][CH:22]([CH3:24])[CH3:23])[CH:16]=[CH:17][C:7]2=1.[H-].[Na+].I[CH3:36]>CN(C=O)C>[CH3:1][C:2]1[N:3]=[CH:4][CH:5]=[C:6]2[C:11]=1[C:10](=[O:12])[N:9]([CH3:13])[C:8]1[CH:14]=[C:15]([O:18][CH2:19][C@@H:20]([N:25]([CH3:36])[C:26](=[O:32])[O:27][C:28]([CH3:30])([CH3:29])[CH3:31])[CH2:21][CH:22]([CH3:24])[CH3:23])[CH:16]=[CH:17][C:7]2=1

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 86710338(S)-tert-butyl (1-((4,6-dimethyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate

Product 1

HCID 86710436(S)-tert-butyl (1-((4,6-dimethyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan-2-yl)(methyl)carbamateYield 37%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

(S)-tert-Butyl (1-((4,6-dimethyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate (0.150 g, 0.341 mmol), prepared as described in Example 16, Part H, was taken up in DMF (1 mL) and cooled to 0° C. NaH (0.027 g, 0.683 mmol) was added and the reaction mixture was stirred for 45 min at 0° C. Iodomethane (0.107 mL, 1.706 mmol) was then added and reaction mixture was warmed to room temperature and stirred for 15 min. The mixture was quenched with ice and partitioned between ethyl acetate (4 mL) and water (2 mL). The organic layer was separated, washed with brine (2 mL), dried over sodium sulfate, filtered and concentrated under reduced pressure to afford crude which was purified by preparative HPLC to afford (S)-tert-butyl (1-((4,6-dimethyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan-2-yl)(methyl)carbamate (60 mg, 0.125 mmol, 37% yield) as a light yellow solid. LC/MS (ESI) m/e 454.4 [(M+H)+, calcd for C26H36N3O2 454.3]; LC/MS retention time (method E): tR=1.21 min.

Workup

  1. customreaction mixture
  2. temperaturewas warmed to room temperature
  3. stirringstirred for 15 min
  4. customThe mixture was quenched with ice
  5. custompartitioned between ethyl acetate (4 mL) and water (2 mL)
  6. customThe organic layer was separated
  7. washwashed with brine (2 mL)
  8. dry with materialdried over sodium sulfate
  9. filtrationfiltered
  10. concentrationconcentrated under reduced pressure
  11. customto afford crude which
  12. customwas purified by preparative HPLC

Sources & evidence

ORD record
ord-0564a5b7942047cc937464d41a4ba24a
Source dataset
uspto-grants-2014_12
Patent number
US08901305B2

Reaction notes

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