Triethylamine → N-(4-nitrobenzyl)-3-(t-butoxycarbonyl)thiazolidine-2-carboxamide

HRID 2373758Notes

Reaction equation

HRID 2373758 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][S:10][CH:9]1[C:13]([OH:15])=O)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(N1C=CN=C1)(N1C=CN=C1)=O.[N+:28]([C:31]1[CH:38]=[CH:37][C:34]([CH2:35][NH2:36])=[CH:33][CH:32]=1)([O-:30])=[O:29].C(N(CC)CC)C>C1COCC1.CN(C=O)C>[N+:28]([C:31]1[CH:32]=[CH:33][C:34]([CH2:35][NH:36][C:13]([CH:9]2[N:8]([C:6]([O:5][C:1]([CH3:2])([CH3:3])[CH3:4])=[O:7])[CH2:12][CH2:11][S:10]2)=[O:15])=[CH:37][CH:38]=1)([O-:30])=[O:29]

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 291474-NitrobenzylamineHCID 682631,1'-CarbonyldiimidazoleHCID 46440943-(tert-Butoxycarbonyl)-1,3-thiazolidine-2-carboxylic acid

Product 1

HCID 21918695N-(4-nitrobenzyl)-3-(t-butoxycarbonyl)thiazolidine-2-carboxamideYield 80%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8028TetrahydrofuranSolvent2×

Procedure

3-(t-butoxycarbonyl)thiazolidine-2-carboxylic acid (1 g, 4.3 mmol) and carbonyldiimidazole (0.7 g, 4.3 mmol) are dissolved in THF (10 ml), the mixture is agitated for 1 hour at ambient temperature. 4-nitrobenzylamine (0.81 g, 4.3 mmoles) and triethylamine (0.6 ml. 0.43 g, 4.3 mmoles) in suspension in 10 ml of a THF and DMF mixture (1/1) are added to the preceding solution and the whole is heated under reflux for 5 hours. The solvents are then evaporated off under reduced pressure. The residue is taken up in 25 ml of ethyl acetate and washed 3 times with 15 ml of water. The organic phase is dried and the solvent is evaporated off under reduced pressure. The product obtained is purified on silica gel in a dichloromethane/methanol mixture (95/5). N-(4-nitrobenzyl)-3-(t-butoxycarbonyl)thiazolidine-2-carboxamide is obtained in the form of a pale yellow oil with a yield of 80% (1.25 g).

Workup

  1. temperaturethe whole is heated
  2. temperatureunder reflux for 5 hours
  3. customThe solvents are then evaporated off under reduced pressure
  4. washwashed 3 times with 15 ml of water
  5. customThe organic phase is dried
  6. customthe solvent is evaporated off under reduced pressure
  7. customThe product obtained
  8. customis purified on silica gel in a dichloromethane/methanol mixture (95/5)

Sources & evidence

ORD record
ord-ea81f92f3eac4eb3a46e709e4f8ede30
Source dataset
uspto-grants-2008_12
Patent number
US07459558B2

Reaction notes

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