Diethyl Ether → HCID 86707393, compound

HRID 878764Notes

Reaction equation

HRID 878764 reaction equation
Cl[C:2]1[C:11]([CH3:12])=[C:10]([Cl:13])[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[N:3]=1.CC(C)([O-])C.[Na+].[C:20](=[NH:33])([C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1.C(OCC)C>C1(C)C=CC=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].C1(P(C2C=CC=CC=2)C2C=CC3C(=CC=CC=3)C=2C2C3C(=CC=CC=3)C=CC=2P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[Cl:13][C:10]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[N:3]=[C:2]([N:33]=[C:20]([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[C:11]=1[CH3:12]

Participants

8

Reactant 4

HCID 3283Diethyl EtherHCID 136809Benzophenone imineHCID 8178242,4-dichloro-3-methylquinolineHCID 23676156Sodium t-butoxide

Product 1

HCID 86707393HCID 86707393, compoundYield 50%

Reagents, catalysts & solvents 3

HCID 634876Binap, (A+-)-CatalystHCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 1140TolueneSolvent

Conditions

Temperature
100 °C

Procedure

A solution of 2,4-dichloro-3-methylquinoline (1.08 g, 5.1 mmol), tris(dibenzylideneacetone)dipalladium (12 mg, 0.0025 mmol), 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (32 mg, 0.01 mmol) and sodium-t-butoxide (735 mg, 7.6 mmol) in toluene (51 mL) was stirred at room temperature for 5 minutes. To the solution was added benzophenone imine (852 μL, 5.1 mmol), and the mixture was stirred at 100° C. for 4 hours. The reaction solution was cooled to room temperature, and then thereto was added diethyl ether (10 mL). The mixture was stirred for 10 minutes. The solution was filtered through diatomaceous earth, and then concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (hexane→hexane:ethyl acetate=10:1) to give a crude 4-chloro-N-(diphenylmethylene)-3-methylquinolin-2-amine (910 mg, 50%) as a yellow solid. (2) The above crude compound (910 mg, 2.6 mmol) was dissolved in tetrahydrofuran (10 mL), and then thereto was added 1 mol/L hydrochloric acid solution (2 mL), and the mixture was stirred at room temperature for 1 hour. Then, thereto was added additional 1 mol/L hydrochloric acid solution (1 mL), and then the mixture was stirred for 30 minutes. To the solution was added saturated aqueous sodium bicarbonate solution, and the mixture was extracted with ethyl acetate twice. The organic layer was combined, washed with water and saturated brine, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=3:1→1:1) to give 4-chloro-3-methylquinolin-2-amine (261 mg, 53%) as a white solid.

Workup

  1. temperatureThe reaction solution was cooled to room temperature
  2. stirringThe mixture was stirred for 10 minutes
  3. filtrationThe solution was filtered through diatomaceous earth
  4. concentrationconcentrated under reduced pressure
  5. customThe resulting residue was purified by silica gel column chromatography (hexane→hexane:ethyl acetate=10:1)

Sources & evidence

ORD record
ord-ec49bed79452480e857181e7417b890d
Source dataset
uspto-grants-2015_03
Patent number
US08987445B2

Reaction notes

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