Tetrabutylammonium Fluoride → [(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(trifluoromethoxy)phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methanol

HRID 1055536Notes

Reaction equation

HRID 1055536 reaction equation
C([Si](C)(C)[O:6][CH2:7][C@@H:8]1[C@@H:13]([O:14][CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[C@H:12]([O:22][CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)[C@@H:11]([O:30][CH2:31][C:32]2[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=2)[C@@:10]([C:40]2[CH:45]=[CH:44][C:43]([Cl:46])=[C:42]([CH2:47][C:48]3[CH:53]=[CH:52][C:51]([O:54][C:55]([F:58])([F:57])[F:56])=[CH:50][CH:49]=3)[CH:41]=2)([O:38][CH3:39])[O:9]1)(C)(C)C.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>O1CCCC1>[CH2:15]([O:14][C@H:13]1[C@H:12]([O:22][CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)[C@@H:11]([O:30][CH2:31][C:32]2[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=2)[C@@:10]([C:40]2[CH:45]=[CH:44][C:43]([Cl:46])=[C:42]([CH2:47][C:48]3[CH:49]=[CH:50][C:51]([O:54][C:55]([F:57])([F:58])[F:56])=[CH:52][CH:53]=3)[CH:41]=2)([O:38][CH3:39])[O:9][C@@H:8]1[CH2:7][OH:6])[C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1

Participants

4

Reactant 2

HCID 2724141Tetrabutylammonium FluorideHCID 86685139[[(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(trifluoromethoxy)phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methoxy]tert-butyl-dimethyl-silane

Product 1

HCID 86685140[(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(trifluoromethoxy)phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methanolYield 35.3%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
45 °C

Procedure

To a solution of tert-butyl-dimethyl-[[(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(trifluoromethoxy)phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methoxy]silane 15j (5.27 g, 6.43 mmol) in tetrahydrofuran (35 mL) was added tetrabutylammonium fluoride (9.64 mL, 9.64 mmol, 1 M in tetrahydrofuran) at room temperature. The mixture was stirred at 45° C. for 48 hours. The reaction mixture was quenched with water (10 mL) and partitioned. The aqueous layer was extracted with ethyl acetate (20 mL×2). The combined organic layers were washed with saturated aqueous sodium chloride (20 mL×2), dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo and the residue was purified by silica gel chromatography eluted with PE/EtOAc(v/v)=8/1 to give the title compound 15k as yellow oil (1.70 g, 35.3%). The compound was characterized by the following spectroscopic data: 1H NMR (400 MHz, CDCl3) δ (ppm): 7.45-7.30 (m, 13H), 7.26-7.17 (m, 3H), 7.14 (d, 2H), 7.08 (d, 2H), 7.01 (d, 2H), 4.99-4.87 (m, 3H), 4.71 (d, 1H), 4.56 (d 1H), 4.25-4.11 (m, 2H), 3.95 (m, 3H), 3.75 (m, 3H), 3.33 (d, 1H), 3.09 (s, 3H).

Workup

  1. customThe reaction mixture was quenched with water (10 mL)
  2. custompartitioned
  3. extractionThe aqueous layer was extracted with ethyl acetate (20 mL×2)
  4. washThe combined organic layers were washed with saturated aqueous sodium chloride (20 mL×2)
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationfiltered
  7. concentrationThe filtrate was concentrated in vacuo
  8. customthe residue was purified by silica gel chromatography
  9. washeluted with PE/EtOAc(v/v)=8/1

Sources & evidence

ORD record
ord-2b996348c8e3445db10b4cf807c537b5
Source dataset
uspto-grants-2016_07
Patent number
US09394329B2

Reaction notes

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