HCID 58194817, compound → HCID 57390875, compound

HRID 1753948Notes

Reaction equation

HRID 1753948 reaction equation
[CH2:1]([N:3]([CH2:14][CH3:15])[C:4]([CH:6]1[CH2:11][CH2:10][CH2:9][CH:8](Br)[C:7]1=O)=[O:5])[CH3:2].[F:16][CH2:17][CH2:18][NH:19][C:20]1[CH:25]=[CH:24][C:23]([F:26])=[CH:22][CH:21]=1>CC(O)C.[Cl-].[Zn+2].[Cl-]>[CH2:1]([N:3]([CH2:14][CH3:15])[C:4]([CH:6]1[C:7]2[C:25]3[C:20](=[CH:21][CH:22]=[C:23]([F:26])[CH:24]=3)[N:19]([CH2:18][CH2:17][F:16])[C:8]=2[CH2:9][CH2:10][CH2:11]1)=[O:5])[CH3:2]

Participants

5

Reactant 2

HCID 58194817HCID 58194817, compoundHCID 79007013HCID 79007013, compound

Product 1

HCID 57390875HCID 57390875, compoundYield 10%

Reagents, catalysts & solvents 2

HCID 3007855ZincchlorideCatalystHCID 3776IsopropanolSolvent

Conditions

Temperature
50 °C

Procedure

A mixture of 3-bromo-2-oxo-cyclohexanecarboxylic acid diethylamide (35; prepared according to Example 7(c)) (336 mg, 1.2 mmol) and (2-fluoro-ethyl)-(4-fluoro-phenyl)-amine (38) (383 mg, 2.4 mmol) was stirred under N2 at 50° C. for 3 h and the reaction turned brown. The resulting mixture was dissolved in propan-2-ol (2 mL) and dry zinc chloride (491 mg, 3.6 mmol) was added. The mixture was heated to reflux under N2 for 16 h and then concentrated in vacuo. The residue was dissolved in ethyl acetate (20 mL) and washed with 2 N HCl (10 mL), water (2×10 mL) and aqueous potassium carbonate solution (2×5 mL) then dried and concentrated in vacuo. The crude material was triturated with diethyl ether to afford 40 mg (10%) of 6-fluoro-9-(2-fluoro-ethyl)-2,3,4,9-tetrahydro-1H-carbazole-4-carboxylic acid diethylamide (non-radioactive imaging agent 9) as white solid. The structure was confirmed by 1H NMR (300 MHz, CDCl3) δH 1.13 (3H, t, J=9 Hz, N(CH2CH3)2), 1.30 (3H, t, J=9 Hz, N(CH2CH3)2), 1.55-2.14 (4H, m, 2- and 3-CH2), 2.78-2.86 (2H, m, 1-CH2), 3.36-3.67 (4H, m, N(CH2CH3)2), (1H, m, 4-CH), 4.30 (2H, dm, J=21 Hz, NCH2CH2F), 4.60 (2H, dm, J=41 Hz, NCH2CH2F), 6.75-6.95 (2H, m, NCCHCHCFCH), and 7.05-7.15 (1H, m, NCCHCHCFCH.

Workup

  1. temperatureThe mixture was heated
  2. temperatureto reflux under N2 for 16 h
  3. concentrationconcentrated in vacuo
  4. dissolutionThe residue was dissolved in ethyl acetate (20 mL)
  5. washwashed with 2 N HCl (10 mL), water (2×10 mL) and aqueous potassium carbonate solution (2×5 mL)
  6. customthen dried
  7. concentrationconcentrated in vacuo
  8. customThe crude material was triturated with diethyl ether

Sources & evidence

ORD record
ord-216e25123d9e4455bf6e5e860b3404e6
Source dataset
uspto-grants-2015_10
Patent number
US09168317B2

Reaction notes

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