Diisopropylethylamine → 2-bromo-N-[4-methoxy-7-(tetrahydro-pyran-4-yl)-benzooxazol-2-yl]-isonicotinamide

HRID 1611940Notes

Reaction equation

HRID 1611940 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([CH:8]=[CH:9][N:10]=1)[C:5]([OH:7])=O.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C(N(C(C)C)C(C)C)C.[CH3:44][O:45][C:46]1[C:51]2[N:52]=[C:53]([NH2:55])[O:54][C:50]=2[C:49]([CH:56]2[CH2:61][CH2:60][O:59][CH2:58][CH2:57]2)=[CH:48][CH:47]=1>C1COCC1.O1CCOCC1.CN(C=O)C.O>[Br:1][C:2]1[CH:3]=[C:4]([CH:8]=[CH:9][N:10]=1)[C:5]([NH:55][C:53]1[O:54][C:50]2[C:49]([CH:56]3[CH2:57][CH2:58][O:59][CH2:60][CH2:61]3)=[CH:48][CH:47]=[C:46]([O:45][CH3:44])[C:51]=2[N:52]=1)=[O:7]

Participants

9

Reactant 4

HCID 81531DiisopropylethylamineHCID 2227012-Bromoisonicotinic acidHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 222522334-Methoxy-7-(tetrahydro-pyran-4-yl)-benzooxazol-2-ylamine

Product 1

HCID 222522322-bromo-N-[4-methoxy-7-(tetrahydro-pyran-4-yl)-benzooxazol-2-yl]-isonicotinamideYield 84.4%

Reagents, catalysts & solvents 4

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8028TetrahydrofuranSolventHCID 312751,4-DioxaneSolvent

Procedure

To a stirred solution of 106 mg (0.52 mmol) 2-bromo-isonicotinic acid in 5 ml THF were added 230 mg (0.60 mmol) HATU and 0.10 ml (0.60 mmol) N-ethyldiisopropyl-amine and stirring continued at room temperature for 5 h. A solution of 100 mg (0.40 mmol) 4-methoxy-7-(tetrahydro-pyran-4-yl)-benzooxazol-2-ylamine in 5 ml dioxane and 1 ml DMF was then added and stirring continued at 40° C. for 72 h. The reaction mixture was then poured into 100 ml water and extracted three times with ethyl acetate. The combined organic phases were dried over sodium sulfate and concentrated in vacuo. Flash chromatography (dichoromethane then methanol/dichloromethane 20/80) followed by trituration in ether afforded 146 mg (84%) 2-bromo-N-[4-methoxy-7-(tetrahydro-pyran-4-yl)-benzooxazol-2-yl]-isonicotinamide as a white crystalline solid. ES-MS m/e (%): 434 (M{81Br}+H+, 95), 432 (M{79Br}+H+, 100).

Workup

  1. stirringstirring
  2. waitcontinued at 40° C. for 72 h
  3. extractionextracted three times with ethyl acetate
  4. dry with materialThe combined organic phases were dried over sodium sulfate
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-f70d28d890fd4d42b970ff234391dcca
Source dataset
uspto-grants-2006_01
Patent number
US06992083B2

Reaction notes

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