N,O-Dimethylhydroxylamine → HCID 86639885, compound

HRID 1908860Notes

Reaction equation

HRID 1908860 reaction equation
[CH3:1][C:2]1[CH:3]=[C:4]([CH:8]=[C:9]([CH2:11][CH:12]([CH3:14])[CH3:13])[N:10]=1)[C:5](O)=[O:6].CCN(C(C)C)C(C)C.CN([C:27]([O:31][N:32]1N=NC2C=CC=C[C:33]1=2)=[N+](C)C)C.[B-](F)(F)(F)F.CNOC>C(Cl)Cl>[CH2:11]([C:9]1[CH:8]=[C:4]([CH:3]=[C:2]([CH3:1])[N:10]=1)[C:5]([N:32]([O:31][CH3:27])[CH3:33])=[O:6])[CH:12]([CH3:14])[CH3:13]

Participants

6

Reactant 4

HCID 14232N,O-DimethylhydroxylamineHCID 81531DiisopropylethylamineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 574372032-Methyl-6-(2-methyl-propyl)-isonicotinic acid

Product 1

HCID 86639885HCID 86639885, compoundYield 86.4%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of 2-methyl-6-(2-methyl-propyl)-isonicotinic acid (3.80 g, 16.5 mmol) in DCM (50 mL), DIPEA (10.7 g, 82.7 mmol) followed by TBTU (6.37 g, 19.9 mmol) is added. The mixture is stirred at rt for 10 min before N,O-dimethylhydroxylamine (1.94 g, 19.9 mmol) is added. The mixture is stirred at rt for 1 h before it is diluted with DCM, washed with sat. aq. NaHCO3, followed by water, dried over MgSO4, filtered and concentrated. The crude product is purified by CC on silic gel eluting with heptane:EA 1:1 to give 2-isobutyl-N-methoxy-6,N-dimethyl-isonicotinamide (3.37 g) as a colourless oil; LC-MS: tR=0.61 min; 1H NMR (CDCl3): δ 0.95 (d, J=6.8 Hz, 6H), 2.06-2.18 (m, 1H), 2.60 (s, 3H), 2.69 (d, J=7.3 Hz, 2H), 3.37 (s, 3H), 3.57 (s, 3H), 7.13 (s, 1H), 7.18 (s, 1H).

Workup

  1. additionis added
  2. additionis added
  3. washwashed with sat. aq. NaHCO3
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe crude product is purified by CC on silic gel
  8. washeluting with heptane:EA 1:1

Sources & evidence

ORD record
ord-5b3dd4ff64aa47b99e306a37cbe5a763
Source dataset
uspto-grants-2013_12
Patent number
US08598208B2

Reaction notes

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