1,4-Dioxane → 7-Chloro-3-(4-fluoro-2-(trifluoromethyl)phenyl)thieno[3,2-b]pyridine

HRID 593769Notes

Reaction equation

HRID 593769 reaction equation
Br[C:2]1[C:6]2=[N:7][CH:8]=[CH:9][C:10]([Cl:11])=[C:5]2[S:4][CH:3]=1.[F:12][C:13]1[CH:18]=[CH:17][C:16](B(O)O)=[C:15]([C:22]([F:25])([F:24])[F:23])[CH:14]=1.O1CCOCC1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>C(Cl)Cl.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].C(Cl)Cl>[Cl:11][C:10]1[CH:9]=[CH:8][N:7]=[C:6]2[C:2]([C:16]3[CH:17]=[CH:18][C:13]([F:12])=[CH:14][C:15]=3[C:22]([F:23])([F:25])[F:24])=[CH:3][S:4][C:5]=12

Participants

7

Reactant 4

HCID 312751,4-DioxaneHCID 62657Potassium Phosphate, TribasicHCID 121094694-Fluoro-2-(trifluoromethyl)benzeneboronic acidHCID 867304243-Bromo-7-chlorothieno[3,2-b]pyridine

Product 1

HCID 867304257-Chloro-3-(4-fluoro-2-(trifluoromethyl)phenyl)thieno[3,2-b]pyridineYield 91.4%

Reagents, catalysts & solvents 2

HCID 178418807HCID 178418807, compoundCatalystHCID 6344DichloromethaneSolvent

Conditions

Temperature
90 °C

Procedure

A vessel capable of sealing was charged with a mixture of 3-bromo-7-chlorothieno[3,2-b]pyridine (123 mg, 0.495 mmol), 4-fluoro-2-(trifluoromethyl) phenylboronic acid (123 mg, 0.594 mmol), PdCl2(dppf)-CH2Cl2 adduct (20.21 mg, 0.0.025 mmol), dioxane (6 mL), and a 2.0 M aqueous solution of K3PO4 (0.74 mL, 1.485 mmol) and was purged with nitrogen for 10 min. The vessel was sealed and heated at 90° C. for 3 hours. Upon cooling, the reaction mixture was diluted with CH2Cl2 and filtered with CH2Cl2/MeOH washing. The filtrate was concentrated under reduced pressure. The residue was dissolved in CH2Cl2 and washed with water, brine, dried over anhydrous Na2SO4 and concentrated under reduced pressure. The crude material was purified by BIOTAGE® eluting with 40%-60% CH2Cl2/hexanes at 30 mL/min. Concentration of appropriate fractions provided the title compound (150 mg, 91% yield) as a white solid. LC/MS: Example 101A @ 3.94 min (RT) (Condition G). MS (ES): m/z=331.94, [M+H]+.

Workup

  1. customThe vessel was sealed
  2. temperatureUpon cooling
  3. filtrationfiltered with CH2Cl2/MeOH washing
  4. concentrationThe filtrate was concentrated under reduced pressure
  5. dissolutionThe residue was dissolved in CH2Cl2
  6. washwashed with water, brine
  7. dry with materialdried over anhydrous Na2SO4
  8. concentrationconcentrated under reduced pressure
  9. customThe crude material was purified by BIOTAGE®
  10. washeluting with 40%-60% CH2Cl2/hexanes at 30 mL/min

Sources & evidence

ORD record
ord-bdfc243794064077be85bd1406aa6744
Source dataset
uspto-grants-2016_01
Patent number
US09242967B2

Reaction notes

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