Triphenylphosphine → [1-(4-Chloro-phenyl)-cyclobutyl]-[3-(4-trifluoromethylphenoxymethyl)-azepan-1-yl]-methanone

HRID 2110291Notes

Reaction equation

HRID 2110291 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2([C:12]([N:14]3[CH2:20][CH2:19][CH2:18][CH2:17][CH:16]([CH2:21][OH:22])[CH2:15]3)=[O:13])[CH2:11][CH2:10][CH2:9]2)=[CH:4][CH:3]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[F:42][C:43]([F:52])([F:51])[C:44]1[CH:49]=[CH:48][C:47](O)=[CH:46][CH:45]=1.N(C(OCC)=O)=NC(OCC)=O.[OH-].[Na+]>O1CCCC1.C(OCC)(=O)C>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2([C:12]([N:14]3[CH2:20][CH2:19][CH2:18][CH2:17][CH:16]([CH2:21][O:22][C:47]4[CH:48]=[CH:49][C:44]([C:43]([F:52])([F:51])[F:42])=[CH:45][CH:46]=4)[CH2:15]3)=[O:13])[CH2:11][CH2:10][CH2:9]2)=[CH:6][CH:7]=1

Participants

8

Reactant 5

HCID 11776TriphenylphosphineHCID 14798Sodium HydroxideHCID 678744-(Trifluoromethyl)phenolHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 21902048[1-(4-Chloro-phenyl)-cyclobutyl]-(3-hydroxymethyl-azepan-1-yl)-methanone

Product 1

HCID 21902106[1-(4-Chloro-phenyl)-cyclobutyl]-[3-(4-trifluoromethylphenoxymethyl)-azepan-1-yl]-methanoneYield 26%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
0 °C

Procedure

To a room temperature solution of [1-(4-Chloro-phenyl)-cyclobutyl]-(3-hydroxymethyl-azepan-1-yl)-methanone (0.3307 g, 1.15 mmol) in tetrahydrofuran (5.75 mL, 0.2M) under N2 was added triphenyl phosphine (0.9050 g, 3.45 mmol) and 4-trifluoromethylphenol (0.56 mL, 3.45 mmol). The solution was cooled to 0° C., then diethyl azodicarboxylate (0.54 mL, 3.1 mmol) was added dropwise over 10 minutes. When the reaction was complete by HPLC (2 hours), ethyl acetate and 10% aqueous NaOH was added. The organics were removed, dried with Na2SO4, concentrated, then taken up in Hexanes/ ethyl acetate (70:30) and filtered to remove triphenyl phosphine oxide. The remaining yellow oil was purified by silica gel chromatography (3:1 to 2:3 Hexanes: ethyl acetate). The product was further purified by silica gel chromatography with 9:1 hexanes: ethyl acetate to obtain pure product in 26% yield (0.1301 g). Partial 1H NMR (CDCl3, 300 MHz) 7.55 (2H, t, J=8.7 Hz), 7.36-7.26 (4H, m), 6.92 (2H, dd, J=34.9, 8.7 Hz), 4.00-3.85 (2H, m), ppm. Partial 13C NMR (CDCl3, 75 MHz) 174.95, 161.66, 142.17, 132.35, 129.10, 126.95, 126.77, 114.61,114.61,71.50, 71.10 ppm. LRMS: 465.26.

Workup

  1. additionwas added
  2. customThe organics were removed
  3. dry with materialdried with Na2SO4
  4. concentrationconcentrated
  5. filtrationfiltered
  6. customto remove triphenyl phosphine oxide
  7. customThe remaining yellow oil was purified by silica gel chromatography (3:1 to 2:3 Hexanes: ethyl acetate)
  8. customThe product was further purified by silica gel chromatography with 9:1 hexanes
  9. customethyl acetate to obtain pure product in 26% yield (0.1301 g)

Sources & evidence

ORD record
ord-35b00730cd7c4b7cbb90abb6d14cc395
Source dataset
uspto-grants-2009_04
Patent number
US07517892B2

Reaction notes

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