Sodium Carbonate → 1-[2-(4-Fluorophenyl)cyclopenten-1-yl]-4-(methylthio)benzene

HRID 2225991Notes

Reaction equation

HRID 2225991 reaction equation
Br[C:2]1[CH2:6][CH2:5][CH2:4][C:3]=1[C:7]1[CH:12]=[CH:11][C:10]([S:13][CH3:14])=[CH:9][CH:8]=1.[F:15][C:16]1[CH:21]=[CH:20][C:19](B(O)O)=[CH:18][CH:17]=1.C([O-])([O-])=O.[Na+].[Na+]>C1(C)C=CC=CC=1.C(O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[F:15][C:16]1[CH:21]=[CH:20][C:19]([C:2]2[CH2:6][CH2:5][CH2:4][C:3]=2[C:7]2[CH:12]=[CH:11][C:10]([S:13][CH3:14])=[CH:9][CH:8]=2)=[CH:18][CH:17]=1

Participants

7

Reactant 3

HCID 10340Sodium CarbonateHCID 2856454-Fluorophenylboronic acidHCID 102650591-(2-Bromocyclopenten-1-yl)-4-(methylthio)benzene

Product 1

HCID 106130741-[2-(4-Fluorophenyl)cyclopenten-1-yl]-4-(methylthio)benzene

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 702EthanolSolventHCID 1140TolueneSolvent

Procedure

Under nitrogen, 1.5 g (5.6 mmol) of 1-(2-bromocyclopenten-1-yl)-4-(methylthio)benzene (Step 2) was reacted with 1.5 g (11 mmol) of 4-fluorophenylboronic acid (Lancaster) in 30 mL of toluene, 20 mL of ethanol, and 25 mL of 2M Na2CO3 in the presence of 250 mg of Pd(PPh3)4. The reaction was vigorously stirred at reflux overnight and concentrated in vacuo. The residue was dissolved in ethyl acetate and washed with water, dried (MgSO4), and reconcentrated. Purification by silica gel chromatography with hexane gave 1-[2-(4-fluorophenyl) cyclopenten-1-yl]-4-(methylthio)benzene (41 in Synthetic Scheme X when R5 =SCH3, R10 =F, and R1, R2, R3, R4, R6, R7, R8, R9, R11, and R12 =H) as a colorless solid. mp 46°-47° C.; NMR (CDCl3) d 2.04 (m, J=7 Hz, 2H) , 2.45 (s, 3H), 2.86, (t, J=7 Hz, 4H) , 6.86-6.94 (m, 2H) , 7 . 08 (br s, 4H) , 7.10-7.18 (m, 2H) .

Workup

  1. temperatureat reflux overnight
  2. concentrationconcentrated in vacuo
  3. dissolutionThe residue was dissolved in ethyl acetate
  4. washwashed with water
  5. dry with materialdried (MgSO4)
  6. customPurification by silica gel chromatography with hexane

Sources & evidence

ORD record
ord-98b1d767a2234716a289764bc51d58d9
Source dataset
uspto-grants-1994_09
Patent number
US05344991

Reaction notes

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