Isopropylamine → 3-methyl-N-(1-methylethyl)-2-nitrobenzamide

HRID 2243472Notes

Reaction equation

HRID 2243472 reaction equation
[CH3:1][C:2]1[C:3]([N+:11]([O-:13])=[O:12])=[C:4]([CH:8]=[CH:9][CH:10]=1)[C:5]([OH:7])=O.C(N(CC)CC)C.ClC(OCC)=O.[CH:27]([NH2:30])([CH3:29])[CH3:28]>ClCCl.O>[CH3:1][C:2]1[C:3]([N+:11]([O-:13])=[O:12])=[C:4]([CH:8]=[CH:9][CH:10]=1)[C:5]([NH:30][CH:27]([CH3:29])[CH3:28])=[O:7]

Participants

7

Reactant 4

HCID 6363IsopropylamineHCID 8471TriethylamineHCID 10928Ethyl chloroformateHCID 215753-Methyl-2-nitrobenzoic acid

Product 1

HCID 8902723-methyl-N-(1-methylethyl)-2-nitrobenzamideYield 80.2%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

A solution of 3-methyl-2-nitrobenzoic acid (2.00 g, 11.0 mmol) and triethylamine (1.22 g, 12.1 mmol) in 25 mL of dichloromethane was cooled to 10° C. Ethyl chloroformate was carefully added and a solid precipitate formed. After the mixture was stirred for 30 minutes isopropylamine (0.94 g, 16.0 mmol) was added and a homogeneous solution resulted. The reaction mixture was stirred for an additional hour, poured into water and extracted with ethyl acetate. The organic extracts were washed with water, dried over magnesium sulfate and evaporated under reduced pressure to afford 1.96 g of the desired intermediate as a white solid melting at 126-128° C.

Workup

  1. customa solid precipitate formed
  2. additionwas added
  3. customa homogeneous solution resulted
  4. extractionextracted with ethyl acetate
  5. washThe organic extracts were washed with water
  6. dry with materialdried over magnesium sulfate
  7. customevaporated under reduced pressure

Sources & evidence

ORD record
ord-aa890e923ce74e9dabb06487cb97021f
Source dataset
uspto-grants-2010_03
Patent number
US07674936B2

Reaction notes

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