Potassium Phosphate, Tribasic → 4-(3-{2-[(2R)-2-methyl-1-pyrrolidinyl]ethyl}-7-isoquinolinyl)benzonitrile

HRID 2390400Notes

Reaction equation

HRID 2390400 reaction equation
Br[C:2]1[CH:11]=[C:10]2[C:5]([CH:6]=[C:7]([CH2:12][CH2:13][N:14]3[CH2:18][CH2:17][CH2:16][C@H:15]3[CH3:19])[N:8]=[CH:9]2)=[CH:4][CH:3]=1.[C:20]([C:22]1[CH:27]=[CH:26][C:25](B(O)O)=[CH:24][CH:23]=1)#[N:21].P([O-])([O-])([O-])=O.[K+].[K+].[K+]>C(O)(C)C.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>[CH3:19][C@@H:15]1[CH2:16][CH2:17][CH2:18][N:14]1[CH2:13][CH2:12][C:7]1[N:8]=[CH:9][C:10]2[C:5]([CH:6]=1)=[CH:4][CH:3]=[C:2]([C:25]1[CH:26]=[CH:27][C:22]([C:20]#[N:21])=[CH:23][CH:24]=1)[CH:11]=2

Participants

6

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 27343264-Cyanophenylboronic acidHCID 671046927-bromo-3-{2-[(2R)-2-methyl-1-pyrrolidinyl]ethyl}isoquinoline

Product 1

HCID 104500064-(3-{2-[(2R)-2-methyl-1-pyrrolidinyl]ethyl}-7-isoquinolinyl)benzonitrile

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 3776IsopropanolSolvent

Conditions

Temperature
62.5 °C

Procedure

The product from Example 52G (0.2 g, 0.6 mmol), 4-cyanophenylboronic acid (0.22 g, 1.5 mmol), bis(triphenylphosphine)palladium dichloride (55 mg, 0.08 mmol), and potassium phosphate (7 mL, 0.2 M in water) were combined in isopropanol (7 mL) and heated at 60-65° C. for 7 hours in a sealed flask. The mixture was filtered through diatomaceous earth, the filtrate was concentrated in vacuo, and then partitioned between MTBE (10 mL) and water (10 mL). The organic layer was separated, washed with aqueous sodium bicarbonate solution (5%, 10 mL), and then extracted with a solution of 2M HCl (15 mL). The pH of the acidic aqueous layer was adjusted with base using potassium carbonate and extracted with isopropyl acetate (15 mL). The organic layer was evaporated in vacuo and the residue was chased with heptane (10 mL) to provide the title compound. 1H NMR (CDCl3) δ 1.12 (d, J=6.0 Hz, 3H); 1.37-1.50 (m, 1H); 1.64-1.85 (m, 2H); 1.85-1.98 (m, 1H); 2.26 (q, J=8.8. Hz, 1H); 2.32-2.43 (m, 1H); 2.50-2.60 (m, 1H), 3.09-3.34 (m, 4H); 7.56 (m, 1H); 7.73-7.81 (m, 4H), 7.84-7.87 (m, 2H), 8.12 (m, 1H); 9.26 (s, 1H); HRMS Calcd. for [C23H23N3+H+]: 342.1970. Found: 342.1974.

Workup

  1. filtrationThe mixture was filtered through diatomaceous earth
  2. concentrationthe filtrate was concentrated in vacuo
  3. custompartitioned between MTBE (10 mL) and water (10 mL)
  4. customThe organic layer was separated
  5. washwashed with aqueous sodium bicarbonate solution (5%, 10 mL)
  6. extractionextracted with a solution of 2M HCl (15 mL)
  7. extractionextracted with isopropyl acetate (15 mL)
  8. customThe organic layer was evaporated in vacuo

Sources & evidence

ORD record
ord-f21335c3ae8040268b2f7b79146b07b1
Source dataset
uspto-grants-2012_09
Patent number
US08273767B2

Reaction notes

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