Dimethylformamide → 2-Methyl-6-nitrobenzaldoxime

HRID 1061104Notes

Reaction equation

HRID 1061104 reaction equation
CN(C=O)C.C[O-].[K+].[N+:9]([C:12]1[CH:17]=[CH:16][CH:15]=[C:14]([CH3:18])[C:13]=1[CH3:19])([O-:11])=[O:10].[N:20](OCCCC)=[O:21]>C(O)(=O)C.O>[CH3:18][C:14]1[CH:15]=[CH:16][CH:17]=[C:12]([N+:9]([O-:11])=[O:10])[C:13]=1[CH:19]=[N:20][OH:21]

Participants

7

Reactant 4

HCID 6228DimethylformamideHCID 67391,2-Dimethyl-3-nitrobenzeneHCID 10996Butyl nitriteHCID 23664618Potassium methoxide

Product 1

HCID 853610482-Methyl-6-nitrobenzaldoxime

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 962WaterSolvent

Conditions

Temperature
-40 °C

Procedure

1200 ml of anhydrous DMF are initially charged in a 4 l reaction flask and cooled to −40° C. At this temperature, 336.5 g (4.56 mol) of potassium methoxide (95%) are added and suspended with stirring. A mixture of 300 g (1.92 mol) of 3-nitro-o-xylene (97%) and 274 g (2.52 mol) of n-butyl nitrite (95%) is then added dropwise at −40° C. over a period of 7 hours (if the mixture is cooled accordingly, the duration of this addition can be reduced as desired). The complete conversion of the starting material is checked by HPLC. The reaction discharge is then added with stirring, at from −5 to 0° C., to a mixture of 300 ml of water and 300 ml of glacial acetic acid. The reaction mixture is then poured onto 6 kg of ice-water and the solid is separated off by filtration and washed twice with in each case 500 ml of water.

Workup

  1. additionis then added dropwise at −40° C. over a period of 7 hours (if the mixture
  2. temperatureis cooled accordingly
  3. additionthe duration of this addition
  4. additionThe reaction discharge is then added
  5. customthe solid is separated off by filtration
  6. washwashed twice with in each case 500 ml of water

Sources & evidence

ORD record
ord-804d58d1fd3a423a82ab4298c012f6a9
Source dataset
uspto-grants-2003_02
Patent number
US06525204B1

Reaction notes

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