Methanamine, N-methoxy-, hydrochloride (1:1) → HCID 178502742, compound

HRID 324292Notes

Reaction equation

HRID 324292 reaction equation
[NH:1]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[C@H:2]([C:20](O)=[O:21])[CH2:3][CH2:4][CH2:5][NH:6][C:7](=[NH:19])[NH:8][S:9]([C:12]1[CH:18]=[CH:17][C:15]([CH3:16])=[CH:14][CH:13]=1)(=[O:11])=[O:10].[CH3:30][NH:31][O:32][CH3:33].Cl.CCN(C(C)C)C(C)C.F[P-](F)(F)(F)(F)F.N1(O[P+](N(C)C)(N(C)C)N(C)C)C2C=CC=CC=2N=N1>CN(C=O)C>[NH:1]([C:23]([O:25][C:26]([CH3:29])([CH3:27])[CH3:28])=[O:24])[C@H:2]([C:20]([N:31]([O:32][CH3:33])[CH3:30])=[O:21])[CH2:3][CH2:4][CH2:5][NH:6][C:7](=[NH:19])[NH:8][S:9]([C:12]1[CH:18]=[CH:17][C:15]([CH3:16])=[CH:14][CH:13]=1)(=[O:10])=[O:11]

Participants

6

Reactant 4

HCID 81138Methanamine, N-methoxy-, hydrochloride (1:1)HCID 81531DiisopropylethylamineHCID 83767L-Ornithine, N2-[(1,1-dimethylethoxy)carbonyl]-N5-[imino[[(4-methylphenyl)sulfonyl]amino]methyl]-HCID 151348Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate

Product 1

HCID 178502742HCID 178502742, compoundYield 70%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

To a suspension of Boc-Arg(Tos)-OH (2 g, 4.7 mmol) in DMF (20 mL) at 0° C. was added MeNHOMe.HCl (1 g, 10.3 mmol), DIEA (6 mL) and BOP (2.5 g, 5.6 mmol). The solution was stirred at 0° C. for 10 hours. DMF was evaporated by vacuum. The oily residue was dissolved in EtOAc (200 mL) and water (20 mL). The organic layer was washed with sat. NaHCO3, water (20 mnL), 1 M HCl ( 10 mL) and sat. NaCl (2×20 mL). The organic layer was dried over MgSO4, filtered and evaporated to give a suspension. The suspension was filtered, and the solid was washed with cold EtOAc (10 mL) and dried to give Boc-Arg(Tos)-N(Me)OMe, shown above, (1.5 g, 70% yield).

Workup

  1. customDMF was evaporated by vacuum
  2. dissolutionThe oily residue was dissolved in EtOAc (200 mL)
  3. washThe organic layer was washed with sat. NaHCO3, water (20 mnL), 1 M HCl ( 10 mL) and sat. NaCl (2×20 mL)
  4. dry with materialThe organic layer was dried over MgSO4
  5. filtrationfiltered
  6. customevaporated
  7. customto give a suspension
  8. filtrationThe suspension was filtered
  9. washthe solid was washed with cold EtOAc (10 mL)
  10. customdried

Sources & evidence

ORD record
ord-17438e12142449d483b7d1a96736a436
Source dataset
uspto-grants-2001_04
Patent number
US06218382B1

Reaction notes

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