Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1) → 3-Benzyloxy-1-methyl-4-oxo-6-[(toluene-2-sulfonylamino)-methyl]-1,4-dihydro-pyridine-2-carboxylic acid methylamide

HRID 1846890Notes

Reaction equation

HRID 1846890 reaction equation
[CH2:1]([O:8][C:9]1[C:14](=[O:15])[CH:13]=[C:12]([CH2:16][NH:17][S:18]([C:21]2[C:22]([CH3:27])=[CH:23][CH:24]=[CH:25][CH:26]=2)(=[O:20])=[O:19])[N:11]([CH3:28])[C:10]=1[C:29]([OH:31])=O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:32][N:33](C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C(N(CC)CC)C.CCN(CC)CC.Cl.CN>CN(C)C=O>[CH3:32][NH:33][C:29]([C:10]1[N:11]([CH3:28])[C:12]([CH2:16][NH:17][S:18]([C:21]2[C:22]([CH3:27])=[CH:23][CH:24]=[CH:25][CH:26]=2)(=[O:20])=[O:19])=[CH:13][C:14](=[O:15])[C:9]=1[O:8][CH2:1][C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1)=[O:31]

Participants

6

Reactant 4

HCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 6364545Methylamine hydrochlorideHCID 22592508triethylamine TriethylamineHCID 867257043-Benzyloxy-1-methyl-4-oxo-6-[(toluene-2-sulfonylamino)-methyl]-1,4-dihydro-pyridine-2-carboxylic acid

Product 1

HCID 867257473-Benzyloxy-1-methyl-4-oxo-6-[(toluene-2-sulfonylamino)-methyl]-1,4-dihydro-pyridine-2-carboxylic acid methylamideYield 22.64%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a stirred solution of 3-benzyloxy-1-methyl-4-oxo-6-[(toluene-2-sulfonylamino)-methyl]-1,4-dihydro-pyridine-2-carboxylic acid (13-02) (600.0 mg, 1.36 mmol) in dimethylformamide (10 mL) were added HBTU (O-benzotriazole-N,N,N′,N′-tetramethyl-uronium-hexafluoro-phosphate) (772.74 mg, 2.04 mmol) and triethylamine Et3N (0.942 mL, 6.78 mmol). The mixture was stirred for 30 min., then methylamine hydrochloride salt (274.88 mg, 4.07 mmol) was added and the reaction mixture was stirred at room temperature for 16 h. After completion of the reaction, it was quenched with ice cold water and then extracted with ethyl acetate. Then combined organic layer was washed with water and brine, dried over Na2SO4 and concentrated under reduced pressure. It was then purified using normal column chromatography to get 3-benzyloxy-1-methyl-4-oxo-6-[(toluene-2-sulfonylamino)-methyl]-1,4-dihydro-pyridine-2-carboxylic acid methylamide (15-02) (140.0 mg, 22.64%) as an off white solid.

Workup

  1. stirringthe reaction mixture was stirred at room temperature for 16 h
  2. customAfter completion of the reaction, it
  3. customwas quenched with ice cold water
  4. extractionextracted with ethyl acetate
  5. washThen combined organic layer was washed with water and brine
  6. dry with materialdried over Na2SO4
  7. concentrationconcentrated under reduced pressure
  8. customIt was then purified

Sources & evidence

ORD record
ord-8ebb5a9f1368482fb07583a3037d9d69
Source dataset
uspto-grants-2015_02
Patent number
US08952039B2

Reaction notes

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