1-Chloro-2,2-difluoro-1-phenyl-1,3,6,7,9,10-hexahydro-2H-8-aza-cyclohepta[e]indene-8-carboxylic acid ethyl ester → 2,2-Difluoro-1-phenyl-1,3,6,7,9,10-hexahydro-2H-8-aza-cyclohepta[e]indene-8-carboxylic acid ethyl ester

HRID 925207Notes

Reaction equation

HRID 925207 reaction equation
[CH2:1]([O:3][C:4]([N:6]1[CH2:28][CH2:27][C:10]2[C:11]3[C:12](Cl)([C:20]4[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=4)[C:13]([F:19])([F:18])[CH2:14][C:15]=3[CH:16]=[CH:17][C:9]=2[CH2:8][CH2:7]1)=[O:5])[CH3:2].[H][H]>CCO.[Pd]>[CH2:1]([O:3][C:4]([N:6]1[CH2:28][CH2:27][C:10]2[C:11]3[CH:12]([C:20]4[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=4)[C:13]([F:19])([F:18])[CH2:14][C:15]=3[CH:16]=[CH:17][C:9]=2[CH2:8][CH2:7]1)=[O:5])[CH3:2]

Participants

5

Reactant 2

HCID 867253171-Chloro-2,2-difluoro-1-phenyl-1,3,6,7,9,10-hexahydro-2H-8-aza-cyclohepta[e]indene-8-carboxylic acid ethyl esterHCID 178418361HCID 178418361, compound

Product 1

HCID 867253192,2-Difluoro-1-phenyl-1,3,6,7,9,10-hexahydro-2H-8-aza-cyclohepta[e]indene-8-carboxylic acid ethyl esterYield 78.6%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 702EthanolSolvent

Procedure

Into a 500 ml Parr bottle, the product from step (d) (5.9 g, 14.56 mmol) dissolved in EtOH (150 ml) was added. To the solution, 5% Pd—C (3 g) was added. The reaction mixture was shaken over hydrogen (50 psi) for 16 hours. The reaction mixture was filtered through celite and the volatiles were evaporated in vacuo to give the crude product. Purification by silica-gel chromatography (gradient elution: 0 to 20% EtOAc in hexanes) gave the sub-title compound as a colorless oil (4.25 g). 1H NMR (300 MHz, CHCl3) δ 7.28-7.26 (m, 3H); 7.10 (s, 2H); 7.01-6.98 (m, 2H); 4.64 (d, J=20.1 Hz, 1H); 4.11-4.01 (m, 2H); 3.66-3.60 (m, 1H); 3.54-3.31 (m, 4H); 3.13-3.06 (m, 1H); 2.89-2.85 (m, 2H); 2.67-2.47 (m, 2H); 1.26-1.22 (m, 3H); MS: ESI (positive): 372 (M+1).

Workup

  1. additionwas added
  2. filtrationThe reaction mixture was filtered through celite
  3. customthe volatiles were evaporated in vacuo
  4. customto give the crude product
  5. customPurification
  6. washby silica-gel chromatography (gradient elution: 0 to 20% EtOAc in hexanes)

Sources & evidence

ORD record
ord-579d6055a26641b6a313aa55a7b8bd9c
Source dataset
uspto-grants-2016_03
Patent number
US09284277B2

Reaction notes

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