4,4,4-Trifluoro-3-(trifluoromethyl)crotonic acid → (R)-4,4,4-trifluoro-N-(1-(4-fluoro-3-isopropoxyphenyl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenylethyl)-3-(trifluoromethyl)but-2-enamide

HRID 1874221Notes

Reaction equation

HRID 1874221 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([C@:8]([C:17]2[CH:22]=[C:21]([O:23][C:24]([F:29])([F:28])[CH:25]([F:27])[F:26])[CH:20]=[C:19]([F:30])[CH:18]=2)([NH2:16])[CH2:9][C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)=[CH:4][C:3]=1[O:31][CH:32]([CH3:34])[CH3:33].[F:35][C:36]([F:47])([F:46])[C:37]([C:42]([F:45])([F:44])[F:43])=[CH:38][C:39](O)=[O:40]>C(#N)C>[F:35][C:36]([F:46])([F:47])[C:37]([C:42]([F:43])([F:44])[F:45])=[CH:38][C:39]([NH:16][C@:8]([C:5]1[CH:6]=[CH:7][C:2]([F:1])=[C:3]([O:31][CH:32]([CH3:34])[CH3:33])[CH:4]=1)([C:17]1[CH:22]=[C:21]([O:23][C:24]([F:28])([F:29])[CH:25]([F:27])[F:26])[CH:20]=[C:19]([F:30])[CH:18]=1)[CH2:9][C:10]1[CH:11]=[CH:12][CH:13]=[CH:14][CH:15]=1)=[O:40]

Participants

4

Reactant 2

HCID 156694,4,4-Trifluoro-3-(trifluoromethyl)crotonic acidHCID 59458471(R)-1-(4-fluoro-3-isopropoxyphenyl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenylethanamine

Product 1

HCID 23582231(R)-4,4,4-trifluoro-N-(1-(4-fluoro-3-isopropoxyphenyl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenylethyl)-3-(trifluoromethyl)but-2-enamideYield 74%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent2×

Procedure

A round bottom flask was charged with IIDQ polystyrene resin (493 mg, 1.5 mmol/g, 0.74 mmol) and acetonitrile (5 mL) and sealed with a rubber septum. The suspension was vacuumed and reflushed with argon three times. To the resulting slurry was added a solution of (R)-1-(4-fluoro-3-isopropoxyphenyl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenylethanamine, prepared as described in Procedures 109, 110, 111, 112, 113, 114, (180 mg, 0.37 mmol) and 4,4,4-trifluoro-3-(trifluoromethyl)crotonic acid (93 mg, 0.45 mmol) in acetonitrile (5 mL) and the reaction mixture was stirred at room temperature for 18 h. The reaction mixture was filtered and the filtrate was concentrated under reduced pressure and purified by ISCO chromatography (40 g column) using hexane/EtOAc (0-15% over 30 min) to give (R)-4,4,4-trifluoro-N-(1-(4-fluoro-3-isopropoxyphenyl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenylethyl)-3-(trifluoromethyl)but-2-enamide (Example 291) as a white solid at a retention time of 20 min (199 mg, 74% yield). LCMS: RT=2.18 min [M+H] 674.33 (Phenomenex Luna C18 column, 4.6×30 mm eluting with 10-90% MeOH/H2O over 2 minutes containing 0.1% TFA; 5 mL/min, monitoring at 220 nm); HPLC: RT=4.25 min, Purity 98% (Phenomenex Luna C18 column, 4.6×50 mm eluting with 10-90% MeOH/H2O over 4 minutes containing 0.2% PPA; 4 mL/min, monitoring at 220 nm); NMR: 400 MHz 1H (CDCl3) 7.19 ppm, 3H, m; 7.02 ppm, 1H, dd, J=10.55, 8.79 Hz; 6.95 ppm, 3H, m; 6.85 ppm, 1H, s; 6.67 ppm, 3H, d, J=7.03 Hz; 6.62 ppm, 1H, m; 6.13 ppm, 1H, s; 5.88 ppm, 1H, tt, J=53.00, 2.86, 2.75 Hz; 4.36 ppm, 1H, ddd, J=11.97, 6.15, 6.04 Hz; 3.99 ppm, 1H, d, J=13.18 Hz; 3.71 ppm, 1H, d, J=13.18 Hz; 1.26 ppm, 6H, m.

Workup

  1. customsealed with a rubber septum
  2. customprepared
  3. filtrationThe reaction mixture was filtered
  4. concentrationthe filtrate was concentrated under reduced pressure
  5. custompurified by ISCO chromatography (40 g column)
  6. customhexane/EtOAc (0-15% over 30 min)

Sources & evidence

ORD record
ord-6b061004c49e481aa7344f62179ddda4
Source dataset
uspto-grants-2012_11
Patent number
US08304403B2

Reaction notes

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