Dimethylformamide → 4-Chloro-7-ethoxy-6-methoxy-3-quinolinecarbonitrile

HRID 612114

Reaction equation

HRID 612114 reaction equation
[CH2:1]([O:3][C:4]1[CH:13]=[C:12]2[C:7]([C:8](=O)[C:9]([C:14]#[N:15])=[CH:10][NH:11]2)=[CH:6][C:5]=1[O:17][CH3:18])[CH3:2].C(Cl)(=O)C([Cl:22])=O.CN(C=O)C.S([O-])([O-])(=O)=O.[Mg+2]>C(Cl)(Cl)Cl.C(=O)(O)[O-].[Na+].C(Cl)Cl>[Cl:22][C:8]1[C:7]2[C:12](=[CH:13][C:4]([O:3][CH2:1][CH3:2])=[C:5]([O:17][CH3:18])[CH:6]=2)[N:11]=[CH:10][C:9]=1[C:14]#[N:15]

Participants

8

Reactant 4

HCID 6228DimethylformamideHCID 24083Sulfuric acid magnesium salt (1:1)HCID 65578Oxalyl chlorideHCID 104904723-Quinolinecarbonitrile, 7-ethoxy-1,4-dihydro-6-methoxy-4-oxo-

Product 1

HCID 105634734-Chloro-7-ethoxy-6-methoxy-3-quinolinecarbonitrileYield 89.1%

Reagents, catalysts & solvents 3

HCID 6212ChloroformSolventHCID 6344DichloromethaneSolventHCID 516892Sodium BicarbonateSolvent

Procedure

Mixed 122 mg (0.50 mmol) 7-ethoxy-1,4-dihydro-6-methoxy-4-oxo-3-quinolinecarbonitrile and 2.0 ml methylene chloride under N2 and kept temperature near 25° C. Added 218 ill (2.5 mmol) oxalyl chloride and 10 μl (0.125 mmol) DMF. Stirred overnight, diluted with chloroform and stirred in saturated sodium bicarbonate until basic. Separated layers and dried organics with magnesium sulfate, stripped solvent and dried in vacuo, giving 117 mg of tan solid: mass spectrum (electrospray m/e): M+H=262.8, 264.8.

Workup

  1. customnear 25° C
  2. customdried in vacuo

Sources & evidence

ORD record
ord-6c06a164c952410dab91ec566965770c
Source dataset
uspto-grants-1999_12
Patent number
US06002008

Linked notes

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