Methyl N-(triethylammoniosulfonyl)carbamate → Methyl 2-(4-{[(benzyloxy)carbonyl]amino}-3-methylphenyl)-4,5-dihydro-1,3-oxazole-4-carboxylate

HRID 43632Notes

Reaction equation

HRID 43632 reaction equation
[CH3:1][O:2][C:3](=[O:28])[C@H:4]([CH2:26][OH:27])[NH:5][C:6](=O)[C:7]1[CH:12]=[CH:11][C:10]([NH:13][C:14]([O:16][CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)=[O:15])=[C:9]([CH3:24])[CH:8]=1.CC[N+](S(N=C(OC)[O-])(=O)=O)(CC)CC>C1COCC1>[CH2:17]([O:16][C:14]([NH:13][C:10]1[CH:11]=[CH:12][C:7]([C:6]2[O:27][CH2:26][CH:4]([C:3]([O:2][CH3:1])=[O:28])[N:5]=2)=[CH:8][C:9]=1[CH3:24])=[O:15])[C:18]1[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=1

Participants

4

Reactant 2

HCID 2724994Methyl N-(triethylammoniosulfonyl)carbamateHCID 67548569N-(4-{[(Benzyloxy)carbonyl]amino}-3-methylbenzoyl)serine methyl ester

Product 1

HCID 67548198Methyl 2-(4-{[(benzyloxy)carbonyl]amino}-3-methylphenyl)-4,5-dihydro-1,3-oxazole-4-carboxylateYield 83.3%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

The same operation as in Example (97b) was performed using N-(4-{[(benzyloxy)carbonyl]amino}-3-methylbenzoyl)serine methyl ester obtained in Example (109b) (1.8 g, 4.66 mmol), the Burgess reagent (1.44 g, 6.06 mmol) and THF (15 mL). Purification by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/4, 1/2, 1/1, 2/1) gave 1.43 g of the title compound as a colorless solid (83%).

Workup

  1. customPurification
  2. washby silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/4, 1/2, 1/1, 2/1)

Sources & evidence

ORD record
ord-ca215d57cb904325812389538b996b1f
Source dataset
uspto-grants-2013_09
Patent number
US08536197B2

Reaction notes

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