4-Methylmorpholine → 2-Chloro-4-{[3-(5-chloro-2-methoxy-benzenesulfonyl)-2,3-dihydro-benzooxazole-5-carbonyl]-amino}-benzoic acid ethyl ester

HRID 1360276Notes

Reaction equation

HRID 1360276 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([O:23][CH3:24])=[C:6]([S:8]([N:11]2[C:15]3[CH:16]=[C:17]([C:20]([OH:22])=O)[CH:18]=[CH:19][C:14]=3[O:13][CH2:12]2)(=[O:10])=[O:9])[CH:7]=1.[NH2:25][C:26]1[CH:36]=[CH:35][C:29]([C:30]([O:32][CH2:33][CH3:34])=[O:31])=[C:28]([Cl:37])[CH:27]=1.CN1CCOCC1.F[P-](F)(F)(F)(F)F.N1(OC(N(C)C)=[N+](C)C)C2N=CC=CC=2N=N1>CN(C)C=O.CN(C)C1C=CN=CC=1>[CH2:33]([O:32][C:30](=[O:31])[C:29]1[CH:35]=[CH:36][C:26]([NH:25][C:20]([C:17]2[CH:18]=[CH:19][C:14]3[O:13][CH2:12][N:11]([S:8]([C:6]4[CH:7]=[C:2]([Cl:1])[CH:3]=[CH:4][C:5]=4[O:23][CH3:24])(=[O:9])=[O:10])[C:15]=3[CH:16]=2)=[O:22])=[CH:27][C:28]=1[Cl:37])[CH3:34]

Participants

7

Reactant 4

HCID 79724-MethylmorpholineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 13287887Ethyl 4-amino-2-chlorobenzoateHCID 667890473-(5-Chloro-2-methoxy-benzenesulfonyl)-2,3-dihydro-benzooxazole-5-carboxylic acid

Product 1

HCID 667890592-Chloro-4-{[3-(5-chloro-2-methoxy-benzenesulfonyl)-2,3-dihydro-benzooxazole-5-carbonyl]-amino}-benzoic acid ethyl esterYield 57%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
60 °C

Procedure

A solution of 3-(5-chloro-2-methoxy-benzenesulfonyl)-2,3-dihydro-benzooxazole-5-carboxylic acid (1.00 g, 2.70 mmol), ethyl 4-amino-2-chlorobenzoate (1.08 g, 5.41 mmol), 4-methylmorpholine (1.37 g, 13.5 mmol), and O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyl-uronium hexafluoro-phosphate (1.54 g, 4.06 mmol) in N,N-dimethylformamide (10 mL) was stirred at room temperature for 15 min, then 4-(dimethylamino)pyridine (337 mg, 2.70 mmol) were added, and the solution was stirred at 60° C. for 18 h. After cooling, the reaction mixture was partitioned between water, heptane, and ethyl acetate. The organic layer was washed with brine, dried (MgSO4), and evaporated. Chromatography (SiO2, heptane-ethyl acetate gradient) produced 2-chloro-4-{[3-(5-chloro-2-methoxy-benzenesulfonyl)-2,3-dihydro-benzooxazole-5-carbonyl]-amino}-benzoic acid ethyl ester (849 mg, 57%). Off-white solid, MS (ISP)=551.2 (M+H)+.

Workup

  1. temperatureAfter cooling
  2. customthe reaction mixture was partitioned between water, heptane, and ethyl acetate
  3. washThe organic layer was washed with brine
  4. dry with materialdried (MgSO4)
  5. customevaporated

Sources & evidence

ORD record
ord-2d0e9c7a2ed740b59f687a7df359a4a0
Source dataset
uspto-grants-2011_02
Patent number
US07879845B2

Reaction notes

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