Dimethylformamide → 2-carbopropoxy-6-(3-(quinolin-2-ylmethoxy)benzyloxy)-4-oxo-4H1-benzopyran

HRID 1090779Notes

Reaction equation

HRID 1090779 reaction equation
Cl[CH2:2][C:3]1[CH:4]=[C:5]([CH:18]=[CH:19][CH:20]=1)[O:6][CH2:7][C:8]1[CH:17]=[CH:16][C:15]2[C:10](=[CH:11][CH:12]=[CH:13][CH:14]=2)[N:9]=1.[C:21]([C:27]1[O:28][C:29]2[CH:37]=[CH:36][C:35]([OH:38])=[CH:34][C:30]=2[C:31](=[O:33])[CH:32]=1)([O:23][CH2:24][CH2:25][CH3:26])=[O:22].C(=O)([O-])[O-].[K+].[K+].CN(C)C=O>CC(C)=O>[C:21]([C:27]1[O:28][C:29]2[CH:37]=[CH:36][C:35]([O:38][CH2:2][C:3]3[CH:20]=[CH:19][CH:18]=[C:5]([O:6][CH2:7][C:8]4[CH:17]=[CH:16][C:15]5[C:10](=[CH:11][CH:12]=[CH:13][CH:14]=5)[N:9]=4)[CH:4]=3)=[CH:34][C:30]=2[C:31](=[O:33])[CH:32]=1)([O:23][CH2:24][CH2:25][CH3:26])=[O:22]

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 145017062-(3-Chloromethylphenoxy)methylquinolineHCID 199138472-carbopropoxy-6-hydroxy-4-oxo-4H-1-benzopyran

Product 1

HCID 199138482-carbopropoxy-6-(3-(quinolin-2-ylmethoxy)benzyloxy)-4-oxo-4H1-benzopyranYield 28.2%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

A mixture of 3.47g of 2-((3-chloromethylphenoxy)methyl)quinoline, 3.04g of 2-carbopropoxy-6-hydroxy-4-oxo-4H-1-benzopyran, 1.69g of potassium carbonate and 1 ml of dimethylformamide is refluxed in 50 ml of acetone for 41 hours. The mixture is concentrated in vacuo and the residue is dissolved in water. This solution is neutralized with diluted hydrochloric acid and the resulting solid is filtered off and purified by flash silica gel chromatography in propanol-dimethylformamide to give 1.71 g of 2-carbopropoxy-6-(3-(quinolin-2-ylmethoxy)benzyloxy)-4-oxo-4H-1-benzopyran as a white solid having an m.p. of 109°-10° C.

Workup

  1. concentrationThe mixture is concentrated in vacuo
  2. dissolutionthe residue is dissolved in water
  3. filtrationthe resulting solid is filtered off
  4. custompurified by flash silica gel chromatography in propanol-dimethylformamide

Sources & evidence

ORD record
ord-e4271e3addaf4b8d83c36d91afe706c0
Source dataset
uspto-grants-1992_01
Patent number
US05082849

Reaction notes

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