2-Chlorobenzoyl chloride → N-[5-(5-chlorobenzoxazol-6-yl)(2-pyridyl)](2-chlorophenyl)carboxamide

HRID 1036080Notes

Reaction equation

HRID 1036080 reaction equation
[Cl:1][C:2]1[C:3]([C:11]2[CH:12]=[CH:13][C:14]([NH2:17])=[N:15][CH:16]=2)=[CH:4][C:5]2[O:9][CH:8]=[N:7][C:6]=2[CH:10]=1.[Cl:18][C:19]1[CH:27]=[CH:26][CH:25]=[CH:24][C:20]=1[C:21](Cl)=[O:22].CCN(C(C)C)C(C)C.C([O-])(O)=O.[Na+].C(Cl)Cl>CN(C1C=CN=CC=1)C.C(Cl)Cl>[Cl:1][C:2]1[C:3]([C:11]2[CH:12]=[CH:13][C:14]([NH:17][C:21]([C:20]3[CH:24]=[CH:25][CH:26]=[CH:27][C:19]=3[Cl:18])=[O:22])=[N:15][CH:16]=2)=[CH:4][C:5]2[O:9][CH:8]=[N:7][C:6]=2[CH:10]=1

Participants

7

Reactant 4

HCID 691102-Chlorobenzoyl chlorideHCID 81531DiisopropylethylamineHCID 23716255Sodium bicarbonate methylene chlorideHCID 584869115-(5-Chlorobenzoxazol-6-yl)-2-pyridylamine

Product 1

HCID 58486794N-[5-(5-chlorobenzoxazol-6-yl)(2-pyridyl)](2-chlorophenyl)carboxamideYield 49.2%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

To a solution of 5-(5-chlorobenzoxazol-6-yl)-2-pyridylamine (31) (23 mg, 0.09 mmol) and 2 mg DMAP in 2 ml DCM was added 2-chlorobenzoyl chloride (23 μl, 0.18 mmol) followed by addition of DIEA (94 μl). The resulting brown solution was stirred at r.t. for overnight. The reaction mixture was worked up with aq. NaHCO3/DCM. DCM phase was washed with brine, concentrated to dryness. The residue was dissolved in 2 ml THF/MeOH/H2O (5:4:1) and stirred with 1N NaOH (135 μl) at r.t. for 30 min before worked up with EA/aq. NaHCO3. Silica gel flash chromatography furnished 17 mg 32 as pale yellow solid. (yield: 49%).

Workup

  1. washDCM phase was washed with brine
  2. concentrationconcentrated to dryness
  3. dissolutionThe residue was dissolved in 2 ml THF/MeOH/H2O (5:4:1)
  4. stirringstirred with 1N NaOH (135 μl) at r.t. for 30 min

Sources & evidence

ORD record
ord-41986f35331e4674a847ba7a7480b993
Source dataset
uspto-grants-2013_10
Patent number
US08546403B2

Reaction notes

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