HCID 117928482, compound → 1-[(1R,2S,3S,4R,5S)-2,3,4-tribenzyloxy-5-[4-chloro-3[(4-ethoxyphenyl)methyl]phenyl]-6,8-dioxabicyclo[3.2.1]octan-1-yl]but-2-yn-1-ol

HRID 1055510Notes

Reaction equation

HRID 1055510 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@@H:14]([O:24][CH2:25][C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=2)[C@:13]2([C:33]3[CH:38]=[CH:37][C:36]([Cl:39])=[C:35]([CH2:40][C:41]4[CH:46]=[CH:45][C:44]([O:47][CH2:48][CH3:49])=[CH:43][CH:42]=4)[CH:34]=3)[O:32][C@@:10]1([CH:50]=[O:51])[CH2:11][O:12]2)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:52]([Mg]Br)#[C:53][CH3:54]>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@@H:14]([O:24][CH2:25][C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=2)[C@:13]2([C:33]3[CH:38]=[CH:37][C:36]([Cl:39])=[C:35]([CH2:40][C:41]4[CH:42]=[CH:43][C:44]([O:47][CH2:48][CH3:49])=[CH:45][CH:46]=4)[CH:34]=3)[O:32][C@@:10]1([CH:50]([OH:51])[C:52]#[C:53][CH3:54])[CH2:11][O:12]2)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

4

Reactant 2

HCID 117928482HCID 117928482, compoundHCID 178419101HCID 178419101, compound

Product 1

HCID 1183778131-[(1R,2S,3S,4R,5S)-2,3,4-tribenzyloxy-5-[4-chloro-3[(4-ethoxyphenyl)methyl]phenyl]-6,8-dioxabicyclo[3.2.1]octan-1-yl]but-2-yn-1-olYield 69%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of (1S,2S,3S,4R,5S)-2,3,4-tribenzyloxy-5-[4-chloro-3-[(4-ethoxyphenyl)methyl]phenyl]-6,8-dioxabicyclo[3.2.1]octane-1-carbaldehyde 1k (0.2 g, 0.28 mmol, obtained from the synthetic method described in step 10 of example 1) in anhydrous tetrahydrofuran (10 mL) was added dropwise 1-propynylmagnesium bromide (1.1 mL, 0.57 mmol, 0.5 M in tetrahydrofuran) at 0° C. After the addition, the mixture was stirred at room temperature for 4 hours and quenched with 1.5 mL of saturated aqueous ammonium chloride. The resulting mixture was extracted with ethyl acetate (20 mL×3). The combined organic layers were washed with water (10 mL×2) and then saturated aqueous sodium chloride (10 mL×2), dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by silica gel chromatography eluted with PE/EtOAc(v/v)=8/1 to give the title compound 5a as colorless oil (145 mg, 69%). The compound was characterized by the following spectroscopic data: 1H NMR (400 MHz, CDCl3) δ(ppm:) 7.45 (m, 1H), 7.37 (m, 2H), 7.32 (m, 8H), 7.28 (m, 2H), 7.16 (m, 3H), 7.07 (d, 2H), 6.88 (m, 2H), 6.74 (m, 2H), 4.90 (m, 1H), 4.85 (m, 1H), 4.81 (m, 1H), 4.57 (m, 1H), 4.37 (t, 1H), 4.29 (m, 1H), 4.23 (m, 1H), 4.17 (m, 1H), 4.09 (m, 1H), 4.02 (m, 2H), 3.96 (m, 3H), 3.84 (d, 1H), 3.73 (d, 1H), 2.35 (d, 1H), 1.84 (s, 3H), 1.38 (t, 3H).

Workup

  1. additionAfter the addition
  2. customquenched with 1.5 mL of saturated aqueous ammonium chloride
  3. extractionThe resulting mixture was extracted with ethyl acetate (20 mL×3)
  4. washThe combined organic layers were washed with water (10 mL×2)
  5. dry with materialsaturated aqueous sodium chloride (10 mL×2), dried over anhydrous sodium sulfate
  6. concentrationconcentrated in vacuo
  7. customThe residue was purified by silica gel chromatography
  8. washeluted with PE/EtOAc(v/v)=8/1

Sources & evidence

ORD record
ord-62acca7fb3ba45cb8b6e3bfa38e3a544
Source dataset
uspto-grants-2016_07
Patent number
US09394329B2

Reaction notes

Loading…