Reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([Cl:8])=[CH:4][N:3]=1.C[Si]([N-][Si](C)(C)C)(C)C.[K+].C1(C)C=CC=CC=1.[Cl:26][C:27]1[CH:38]=[C:31]2[C:32](OC(=O)[NH:36][C:30]2=[CH:29][CH:28]=1)=[O:33]>O1CCCC1>[NH2:36][C:30]1[CH:29]=[CH:28][C:27]([Cl:26])=[CH:38][C:31]=1[C:32]([NH:1][C:2]1[CH:7]=[CH:6][C:5]([Cl:8])=[CH:4][N:3]=1)=[O:33]Participants
6
Conditions
- Temperature
- -78 °C
Procedure
To a solution of 2-amino-5-chloropyridine (328 mg, 2.55 mmol) in tetrahydrofuran (5 ml) was 0.5M potassium bis(trimethylsilyl)amide in toluene (10 ml, 5.05 mmol) dropwise at −78° C. After stirred for additional 0.5 hr at −78° C., the mixture was added 5-chloroisatoic anhydride (0.5 g, 2.55 mmol) at −78° C. The mixture was warmed up to r.t gradually and stirred overnight. After quenched by saturated ammonium chloride solution, the mixture was extracted by ethyl acetate. The organic layer was dried over magnesium sulfate and concentrated to give (2-amino-5-chlorophenyl)-N-(5-chloro(2-pyridyl))carboxamide (0.71 g, 100%). MS found for C12H9Cl2N3O M+=282, (M+2)+=284.
Workup
- customdropwise at −78° C
- temperatureThe mixture was warmed up
- stirringstirred overnight
- customAfter quenched by saturated ammonium chloride solution
- extractionthe mixture was extracted by ethyl acetate
- dry with materialThe organic layer was dried over magnesium sulfate
- concentrationconcentrated
Sources & evidence
- ORD record
- ord-8d1da3bc63a34c6499333c394caf4bb7
- Source dataset
- uspto-grants-2010_06
- Patent number
- US07727982B2
Linked notes
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