p-Toluenesulfonic acid → 3-[5-{1-[3,5-Bis(trifluoromethyl)phenyl]ethoxy}-4-(4-fluorophenyl)octahydro-2H-isoindol-2-yl]cyclopent-2-en-1-one

HRID 1991364Notes

Reaction equation

HRID 1991364 reaction equation
[F:1][C:2]([F:33])([F:32])[C:3]1[CH:4]=[C:5]([C@H:13]([O:15][C@H:16]2[CH2:24][CH2:23][C@H:22]3[C@@H:18]([CH2:19][NH:20][CH2:21]3)[C@@H:17]2[C:25]2[CH:30]=[CH:29][C:28]([F:31])=[CH:27][CH:26]=2)[CH3:14])[CH:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:8]=1.[C:34]1(=O)[CH2:38][CH2:37][C:36](=[O:39])[CH2:35]1.CC1C=CC(S(O)(=O)=O)=CC=1>C1(C)C=CC=CC=1>[F:33][C:2]([F:1])([F:32])[C:3]1[CH:4]=[C:5]([C@H:13]([O:15][C@H:16]2[CH2:24][CH2:23][C@H:22]3[C@@H:18]([CH2:19][N:20]([C:34]4[CH2:38][CH2:37][C:36](=[O:39])[CH:35]=4)[CH2:21]3)[C@@H:17]2[C:25]2[CH:26]=[CH:27][C:28]([F:31])=[CH:29][CH:30]=2)[CH3:14])[CH:6]=[C:7]([C:9]([F:12])([F:10])[F:11])[CH:8]=1

Participants

5

Reactant 3

HCID 6101p-Toluenesulfonic acidHCID 774661,3-CyclopentanedioneHCID 24993312HCID 24993312, compound

Product 1

HCID 236537893-[5-{1-[3,5-Bis(trifluoromethyl)phenyl]ethoxy}-4-(4-fluorophenyl)octahydro-2H-isoindol-2-yl]cyclopent-2-en-1-oneYield 58.8%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

To a solution of 0.73 g (1.5 mmol) of (3aR,4R,5S,7aS)-5-{(1R)-1-[3,5-bis(tri-fluoromethyl)phenyl]ethoxy}-4-(4-fluorophenyl)octahydro-1H-isoindole (Example 6) in ˜25 mL dry toluene was added 0.166 g (1.7 mmol) cyclopentane-1,3-dione and 0.03 g (0.15 mmol) of PTSA. The resulting mixture was heated at reflux for 2 hr. The solvent was removed under vacuum and the residue was purified by prep TLC eluting with CHCl3/2N NH3 in MeOH (9/1) to afford 0.49 g the title compound. The compound could be further purified by chiral HLPC on CHIRACEL AD column eluting with hexanes/EtOH (9/1). The compound could be crystallized (mp=216.5-217.5° C.) from hexanes/EtOAc or hexanes/EtOH. 1H-NMR (CDCl3): δ: 7.71 (1H, s), 7.23 (2H, s), 7.00 (2H, m), 6.93 (2H, t, J=8.2 Hz), 4.89, 4.48 (1H, s), 4.47 (1H, m), 3.71, 3.48 (1H, m), 3.35 (1H, m), 3.28-3.17 (1H, m), 2.95 (1H, m), 2.95, 2.81 (1H, m), 2.68 (2H, m), 2.45 (2H, m), 2.37 (2H, m), 2.15 (1H, m), 1.93 (2H, m), 1.60 (1H, m), 1.38 (1H, m), 1.36 (3,H, t, J=6.0 Hz). MS: (MH)+556.0.

Workup

  1. temperatureThe resulting mixture was heated
  2. temperatureat reflux for 2 hr
  3. customThe solvent was removed under vacuum
  4. customthe residue was purified by prep TLC
  5. washeluting with CHCl3/2N NH3 in MeOH (9/1)

Sources & evidence

ORD record
ord-04831c075229407a9ee039aa6ebdd34c
Source dataset
uspto-grants-2010_01
Patent number
US07645790B2

Reaction notes

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