1,8-Diazabicyclo(5.4.0)undec-7-ene → Methyl 2-(4-{[(benzyloxy)carbonyl]amino}-3-methylphenyl)-1,3-oxazole-4-carboxylate

HRID 43633Notes

Reaction equation

HRID 43633 reaction equation
[CH2:1]([O:8][C:9]([NH:11][C:12]1[CH:17]=[CH:16][C:15]([C:18]2[O:19][CH2:20][CH:21]([C:23]([O:25][CH3:26])=[O:24])[N:22]=2)=[CH:14][C:13]=1[CH3:27])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.BrCC(Cl)(Cl)Cl.C1CCN2C(=NCCC2)CC1>ClCCl>[CH2:1]([O:8][C:9]([NH:11][C:12]1[CH:17]=[CH:16][C:15]([C:18]2[O:19][CH:20]=[C:21]([C:23]([O:25][CH3:26])=[O:24])[N:22]=2)=[CH:14][C:13]=1[CH3:27])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 182782Ethane, bromotrichloro-HCID 67548198Methyl 2-(4-{[(benzyloxy)carbonyl]amino}-3-methylphenyl)-4,5-dihydro-1,3-oxazole-4-carboxylate

Product 1

HCID 68405856Methyl 2-(4-{[(benzyloxy)carbonyl]amino}-3-methylphenyl)-1,3-oxazole-4-carboxylateYield 49.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

The same operation as in Example (108d) was performed using methyl 2-(4-{[(benzyloxy)carbonyl]amino}-3-methylphenyl)-4,5-dihydro-1,3-oxazole-4-carboxylate obtained in Example (109c) (1.43 g, 3.88 mmol), bromotrichloroethane (414 μL, 4.1 mmol), DBU (628 μL, 4.1 mmol) and dichloromethane (10 mL). The resulting residue was purified by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/4, 1/2, 1/1, 2/1) to obtain 0.7 g of the title compound as a colorless solid (49%).

Workup

  1. customThe resulting residue was purified by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/4, 1/2, 1/1, 2/1)

Sources & evidence

ORD record
ord-78d9b82637da458285ee50f906232cb6
Source dataset
uspto-grants-2013_09
Patent number
US08536197B2

Reaction notes

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