Lithium Hydroxide → HCID 178463386, compound

HRID 1620207Notes

Reaction equation

HRID 1620207 reaction equation
[CH2:1]([C:3]1[C:12]2[C:7](=[CH:8][C:9]([O:15][CH3:16])=[C:10]([O:13][CH3:14])[CH:11]=2)[CH:6]=[C:5]([OH:17])[N:4]=1)[CH3:2].Cl.Cl[CH2:20][C:21]1[C:22]([NH:33][CH2:34][CH3:35])=[N:23][C:24]2[C:29]([CH:30]=1)=[CH:28][C:27]([O:31][CH3:32])=[CH:26][CH:25]=2.ClCC1C(NCC)=NC2C(C=1)=CC(OC)=CC=2.[Li+].[OH-]>C1(C)C=CC=CC=1.C(Cl)Cl>[CH2:1]([C:3]1[C:12]2[C:7](=[CH:8][C:9]([O:15][CH3:16])=[C:10]([O:13][CH3:14])[CH:11]=2)[C:6]([CH2:20][C:21]2[C:22]([NH:33][CH2:34][CH3:35])=[N:23][C:24]3[C:29]([CH:30]=2)=[CH:28][C:27]([O:31][CH3:32])=[CH:26][CH:25]=3)=[C:5]([OH:17])[N:4]=1)[CH3:2]

Participants

7

Reactant 4

HCID 3939Lithium HydroxideHCID 681822213-(chloromethyl)-N-ethyl-6-methoxyquinolin-2-amineHCID 681824593-(chloromethyl)-N-ethyl-6-methoxyquinolin-2-amine hydrochlorideHCID 178437769HCID 178437769, compound2×

Product 1

HCID 178463386HCID 178463386, compound

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
150 °C

Procedure

To a stirred solution of 1-ethyl-6,7-dimethoxyisoquinolin-3-ol SLA 28136 (250 mg, 1.07 mmol) in toluene (10 mL) in a 20 mL microwave vial equipped with a magnetic stirrer was added 3-(chloromethyl)-N-ethyl-6-methoxyquinolin-2-amine hydrochloride SLA 28166 (308 mg, 1.07 mmol) followed by 2N aq. LiOH solution (1.07 ml, 2.14 mmol) and the mixture was stirred for 1.5 h at 150° C. under microwave irradiation. After cooling to RT, the mixture was diluted with CH2Cl2:MeOH=9:1 (150 mL) and washed with brine (20 mL), dried over Na2SO4, filtered, and concentrated at 40° C. under vacuum. Purification by column chromatography (SiO2, eluent EtOAc:MeOH=100:0 to 95:5) followed by a new purification by column chromatography (SiO2, eluent CH2Cl2:MeOH=100:0 to 92:8) provided 29 mg of 1-ethyl-4-((2-(ethylamino)-6-methoxyquinolin-3-yl)methyl)-6,7-dimethoxyisoquinolin-3-ol as a brown solid. This product was dissolved in CH2Cl2 (2 mL) in a 10 mL round-bottomed flask equipped with a magnetic stirrer before addition of a 0.49 M HCl solution in MeOH (0.55 mL). The reaction mixture was stirred for 5 min at RT then concentrated at 40° C. under vacuum to afford 1-ethyl-4-((2-(ethylamino)-6-methoxyquinolin-3-yl)methyl)-6,7-dimethoxyisoquinolin-3-ol dihydrochloride 40 as a yellow solid (20 mg, 4% yield).

Workup

  1. temperatureAfter cooling to RT
  2. washMeOH=9:1 (150 mL) and washed with brine (20 mL)
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated at 40° C. under vacuum
  6. customPurification by column chromatography (SiO2, eluent EtOAc:MeOH=100:0 to 95:5)
  7. customfollowed by a new purification by column chromatography (SiO2, eluent CH2Cl2:MeOH=100:0 to 92:8)

Sources & evidence

ORD record
ord-4aeac6c3540c4a12a6f2fd8e813e7e89
Source dataset
uspto-grants-2014_07
Patent number
US08772316B2

Reaction notes

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