Tetrabutylammonium Fluoride → (1S,3R,4R,5S)-3,4-dibenzyloxy-5-[4-chloro-3-[(4-ethoxyphenyl)methyl]phenyl]-1-(hydroxymethyl)-6,8-dioxabicyclo[3.2.1]octan-2-one

HRID 1055615Notes

Reaction equation

HRID 1055615 reaction equation
[CH2:1]([O:8][C@@H:9]1[C@@H:15]([O:16][CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)[C@:14]2([C:25]3[CH:30]=[CH:29][C:28]([Cl:31])=[C:27]([CH2:32][C:33]4[CH:38]=[CH:37][C:36]([O:39][CH2:40][CH3:41])=[CH:35][CH:34]=4)[CH:26]=3)[O:24][C@@:11]([CH2:42][O:43][Si](C(C)(C)C)(C)C)([CH2:12][O:13]2)[C:10]1=[O:51])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>O1CCCC1>[CH2:1]([O:8][C@@H:9]1[C@@H:15]([O:16][CH2:17][C:18]2[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=2)[C@:14]2([C:25]3[CH:30]=[CH:29][C:28]([Cl:31])=[C:27]([CH2:32][C:33]4[CH:34]=[CH:35][C:36]([O:39][CH2:40][CH3:41])=[CH:37][CH:38]=4)[CH:26]=3)[O:24][C@@:11]([CH2:42][OH:43])([CH2:12][O:13]2)[C:10]1=[O:51])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

4

Reactant 2

HCID 2724141Tetrabutylammonium FluorideHCID 131736404(1R,3R,4R,5S)-3,4-dibenzyloxy-1-[(tert-butyl(dimethyl)silyl)oxymethyl]-5-[4-chloro-3-[(4-ethoxyphenyl)methyl]phenyl]-6,8-dioxabicyclo[3.2.1]octan-2-one

Product 1

HCID 118377830(1S,3R,4R,5S)-3,4-dibenzyloxy-5-[4-chloro-3-[(4-ethoxyphenyl)methyl]phenyl]-1-(hydroxymethyl)-6,8-dioxabicyclo[3.2.1]octan-2-oneYield 100%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of (1R,3R,4R,5S)-3,4-dibenzyloxy-1-[(tert-butyl(dimethyl)silyl)oxymethyl]-5-[4-chloro-3-[(4-ethoxyphenyl)methyl]phenyl]-6,8-dioxabicyclo[3.2.1]octan-2-one 28f (15.9 g, 21.8 mmol) in tetrahydrofuran (40 mL) was added tetrabutylammonium fluoride (48 mL, 43.6 mmol, 1 M in tetrahydrofuran) at room temperature. The mixture was stirred at room temperature for 2 hours and extracted with ethyl acetate (100 mL×2). The combined organic phases were washed with water (100 mL×3) and then saturated aqueous sodium chloride (100 mL×3), dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo to give the title compound 28g as colorless oil (13.4 g, 100%). The crude product was used for next step without further purification. The compound was characterized by the following spectroscopic data: 1H NMR (600 MHz, CDCl3) δ (ppm): 7.31 (d, 2H), 7.29-7.22 (m, 6H), 7.13 (m, 1H), 7.07 (m, 2H), 6.98 (d, 2H), 6.75 (d, 2H), 6.68 (d, 2H), 5.28 (s, 1H), 4.93 (d, 1H), 4.59 (d, 1H), 4.31 (m, 2H), 4.10 (d, 1H), 3.99 (m, 2H), 3.96-3.92 (m, 3H), 3.88 (m, 3H), 1.31 (t, 3H).

Workup

  1. extractionextracted with ethyl acetate (100 mL×2)
  2. washThe combined organic phases were washed with water (100 mL×3)
  3. dry with materialsaturated aqueous sodium chloride (100 mL×3), dried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated in vacuo

Sources & evidence

ORD record
ord-d436431ca8164b0bb8b178b5d548bcff
Source dataset
uspto-grants-2016_07
Patent number
US09394329B2

Reaction notes

Loading…