Water → HCID 178486666, compound

HRID 1620155Notes

Reaction equation

HRID 1620155 reaction equation
Br[C:2]1[N:7]=[C:6]([CH2:8][C:9]2[C:18]3[C:13](=[CH:14][C:15]([O:21][CH3:22])=[C:16]([O:19][CH3:20])[CH:17]=3)[C:12]([CH3:23])=[N:11][C:10]=2[OH:24])[CH:5]=[CH:4][CH:3]=1.[C:25]1(B(O)O)[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1.C([O-])([O-])=O.[Na+].[Na+].O>CCO.CCOC(C)=O.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.C(COC)OC>[CH3:20][O:19][C:16]1[CH:17]=[C:18]2[C:13](=[CH:14][C:15]=1[O:21][CH3:22])[C:12]([CH3:23])=[N:11][C:10]([OH:24])=[C:9]2[CH2:8][C:6]1[CH:5]=[CH:4][CH:3]=[C:2]([C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[N:7]=1

Participants

9

Reactant 4

HCID 962WaterHCID 10340Sodium CarbonateHCID 66827Phenylboronic AcidHCID 178486664HCID 178486664, compound2×

Product 1

HCID 178486666HCID 178486666, compound

Reagents, catalysts & solvents 4

HCID 178418476HCID 178418476, compoundCatalystHCID 702EthanolSolventHCID 80711,2-DimethoxyethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a stirred solution of 4-((6-bromopyridin-2-yl)methyl)-6,7-dimethoxy-1-methylisoquinolin-3-ol CCH 34150 (59 mg, 152 μmol) in absolute EtOH (0.9 mL) in a 20 mL microwave vial equipped with a magnetic stirrer were added phenylboronic acid (18 mg, 148 μmol), Pd(PPh3)2Cl2 (10 mg, 14 μmol), a 2 N aq. Na2CO3 solution (0.30 mL, 0.60 mmol), H2O (2.7 mL) and dimethoxyethane (3.5 mL) and the resulting mixture was stirred at 140° C. for 25 min. After cooling to RT, the mixture was diluted with EtOAc (30 mL) and the organic solution was filtered through a celite plug, then washed with brine (10 mL). The organic layer was isolated and the celite plug was then further washed with CH2Cl2 (50 mL) and the resulting organic layer was washed with brine (20 mL). The organic layers were combined, dried over Na2SO4, filtered, and concentrated at 40° C. under vacuum. Purification by column chromatography (SiO2, eluent CH2Cl2:MeOH=100:0 to 94:6) provided 32 mg of 6,7-dimethoxy-1-methyl-4-((6-phenylpyridin-2-yl)methyl)isoquinolin-3-ol. This free base was dissolved in MeOH (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 (0.5 mL). The reaction mixture was stirred for 5 min at RT then concentrated at 40° C. under vacuum to afford 6,7-dimethoxy-1-methyl-4-((6-phenylpyridin-2-yl)methyl)isoquinolin-3-ol dihydrochloride 12 as a pale brown solid (38 mg, 56% yield).

Workup

  1. filtrationthe organic solution was filtered through a celite plug
  2. washwashed with brine (10 mL)
  3. customThe organic layer was isolated
  4. washthe celite plug was then further washed with CH2Cl2 (50 mL)
  5. washthe resulting organic layer was washed with brine (20 mL)
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated at 40° C. under vacuum
  9. customPurification by column chromatography (SiO2, eluent CH2Cl2:MeOH=100:0 to 94:6)

Sources & evidence

ORD record
ord-f619704a3e9f419cbea774f7a524c1be
Source dataset
uspto-grants-2014_07
Patent number
US08772316B2

Reaction notes

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