Methyl iodide → HCID 58537899, compound

HRID 1473755Notes

Reaction equation

HRID 1473755 reaction equation
[CH2:1]([O:8][C:9]1[C:13]2([CH2:18][CH2:17][N:16]([O:19][CH3:20])[CH2:15][CH2:14]2)[NH:12][C:11](=[O:21])[C:10]=1[C:22]1[C:27]([CH3:28])=[CH:26][C:25]([CH3:29])=[CH:24][C:23]=1[CH3:30])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:31][Si]([N-][Si](C)(C)C)(C)C.[Li+].CI>O1CCCC1>[CH2:1]([O:8][C:9]1[C:13]2([CH2:14][CH2:15][N:16]([O:19][CH3:20])[CH2:17][CH2:18]2)[N:12]([CH3:31])[C:11](=[O:21])[C:10]=1[C:22]1[C:23]([CH3:30])=[CH:24][C:25]([CH3:29])=[CH:26][C:27]=1[CH3:28])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 2733832Lithium HexamethyldisilazideHCID 58537922HCID 58537922, compound

Product 1

HCID 58537899HCID 58537899, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Conditions

Temperature
0 °C

Procedure

To a solution of 4-benzyloxy-8-methoxy-3-(2,4,6-trimethyl-phenyl)-1,8-diaza-spiro[4.5]dec-3-en-2-one (40.0 g, 98.4 mmol) in tetrahydrofuran (500 ml) at 0° C. was added a 1.0 M solution of lithium bis(trimethylsilyl)amide in tetrahydrofuran (108.3 ml, 108.3 mmol) dropwise over one hour. The mixture was stirred at 0° C. for 30 minutes and at room temperature for 30 minutes, then treated with methyl iodide (6.75 ml, 15.4 g, 108.2 mmol) dropwise at 0° C. over 10 minutes. Stirring was continued at room temperature overnight and the reaction mixture was quenched with cold saturated aqueous ammonium chloride. The layers were separated, the aqueous phase extracted twice with ethyl acetate, the combined organic phases washed with brine, dried over sodium sulfate and concentrated. The residue was suspended in diethyl ether, stirred for 30 minutes, filtered and dried. Yield: 28.6 g of 4-benzyloxy-8-methoxy-1-methyl-3-(2,4,6-trimethyl-phenyl)-1,8-diaza-spiro[4.5]dec-3-en-2-one (compound P3.5) as a solid, mp 139-141° C.

Workup

  1. stirringStirring
  2. waitwas continued at room temperature overnight
  3. customthe reaction mixture was quenched with cold saturated aqueous ammonium chloride
  4. customThe layers were separated
  5. extractionthe aqueous phase extracted twice with ethyl acetate
  6. washthe combined organic phases washed with brine
  7. dry with materialdried over sodium sulfate
  8. concentrationconcentrated
  9. stirringstirred for 30 minutes
  10. filtrationfiltered
  11. customdried

Sources & evidence

ORD record
ord-b320fed86e47480aaca0a4e558a5f8f4
Source dataset
uspto-grants-2015_04
Patent number
US09018135B2

Reaction notes

Loading…