Chloroacetyl chloride → 2-chloro-5-(5-(chloromethyl)-1,3,4-oxadiazol-2-yl)-N-isopropylpyridin-4-amine

HRID 595504Notes

Reaction equation

HRID 595504 reaction equation
[Cl:1][C:2]1[CH:11]=[C:10]([NH:12][CH:13]([CH3:15])[CH3:14])[C:5]([C:6]([NH:8][NH2:9])=[O:7])=[CH:4][N:3]=1.CCN(CC)CC.[Cl:23][CH2:24][C:25](Cl)=O.S(Cl)(C1C=CC(C)=CC=1)(=O)=O>C(Cl)Cl>[Cl:1][C:2]1[CH:11]=[C:10]([NH:12][CH:13]([CH3:15])[CH3:14])[C:5]([C:6]2[O:7][C:25]([CH2:24][Cl:23])=[N:9][N:8]=2)=[CH:4][N:3]=1

Participants

6

Reactant 4

HCID 6577Chloroacetyl chlorideHCID 73974-Toluenesulfonyl chlorideHCID 8471TriethylamineHCID 896896686-Chloro-4-(isopropylamino)nicotinohydrazide

Product 1

HCID 896908932-chloro-5-(5-(chloromethyl)-1,3,4-oxadiazol-2-yl)-N-isopropylpyridin-4-amine

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a stirred solution of 6-chloro-4-(isopropylamino)nicotinohydrazide (10) (500 mg, 2 mmol) in DCM (10 mL), Et3N (6 mmol, 3 equiv.) and 2-chloroacetyl chloride (3 mmol, 1.5 equiv.) were added and stirred at room temperature for 4 h. Added tosyl chloride (3.2 mmol, 1.5 equiv.) was added at stirred overnight at room temperature. The reaction mixture was diluted with DCM. The DCM layer was washed with 10% NaHCO3 solution followed by water. The organic layer was collected, dried over Na2SO4, filtered and concentrated. The crude material obtained was purified by column chromatography through silica gel and EtOAc:Pet. ether as eluent to afford the desired compound, 2-chloro-5-(5-(chloromethyl)-1,3,4-oxadiazol-2-yl)-N-isopropylpyridin-4-amine LC/MS: Acquity BEH C18 2.1×50 mm, 1.8 micron; Solvent A=0.1% TFA in water; Solvent B=0.1% TFA in ACN; gradient 0-100% B over 2 min; retention time: 0.95 min; LCMS (ES-API), m/z 287.6 (M+H).

Workup

  1. stirringat stirred overnight at room temperature
  2. washThe DCM layer was washed with 10% NaHCO3 solution
  3. customThe organic layer was collected
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe crude material obtained
  8. customwas purified by column chromatography through silica gel and EtOAc

Sources & evidence

ORD record
ord-c0a3dfd1511a4745b141a9196adeef9a
Source dataset
uspto-grants-2016_01
Patent number
US09242976B2

Reaction notes

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