Trimethylsulfonium iodide → HCID 86693878, compound

HRID 1842833Notes

Reaction equation

HRID 1842833 reaction equation
[I-].C[S+](C)C.[Li][CH2:7]CCC.[C:11]([Si:15]([O:18][CH2:19][C@@H:20]1[C@H:24]2[O:25][C:26]([CH3:29])([CH3:28])[O:27][C@H:23]2[C@@H:22]2[O:30][C@H:21]12)([CH3:17])[CH3:16])([CH3:14])([CH3:13])[CH3:12]>C1COCC1>[Si:15]([O:18][CH2:19][C@@H:20]1[C@H:24]2[O:25][C:26]([CH3:29])([CH3:28])[O:27][C@H:23]2[C@H:22]([OH:30])[C:21]1=[CH2:7])([C:11]([CH3:14])([CH3:12])[CH3:13])([CH3:17])[CH3:16]

Participants

5

Reactant 3

HCID 75127Trimethylsulfonium iodideHCID 86693879HCID 86693879, compoundHCID 178418339Butyllithium

Product 1

HCID 86693878HCID 86693878, compoundYield 80%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Conditions

Temperature
0 °C

Procedure

To a −10° C. suspension of trimethylsulfonium iodide (30 g, 149.5 mmol) in THF (150 mL) was added n-BuLi 2.5 M hexane solution (46.0 mL, 83.0 mmol). After 30 min, epoxide (10) (5.0 g, 16.6 mmol) in THF (20 mL) was introduced and the reaction slowly allowed to warm to 0° C. over 1 h; the mixture was then stirred at ambient temperature for 2 hr. The reaction was quenched with water and extracted with ethyl acetate (50 mL×2). The combined organic layers were washed with brine, dried over Na2SO4, filtered, and concentrated under vacuum. The residues were purified on silica gel column chromatography (10% EtOAc/Hexane) to give allylic alcohol 11 (4 g, 80%) as an oil. [α]22D −20.35° (c 2.0, CHCl3); 1H NMR (500 MHz, CDCl3) δ 5.31 (s, 1H), 5.11 (s, 1H), 4.52 (d, J=6 Hz, 1H), 4.32-4.31 (m, 1H), 4.13-4.11 (m, 1H), 3.81-3.79 (m, 2H), 3.62-3.60 (m, 1H), 3.91-3.90 (m, 1H,), 2.62 (br, 1H), 1.30 (s, 3H), 1.20 (s, 3H), 0.80 (m, 9H), 0.013-0.006 (m, 6H); 13C NMR (125 MHz, CDCl3) δ 157.9, 115.9, 92.6, 88.8, 84.1, 72.4, 59.0, 32.6, 31.5, 30.4, 24.0, 0.05; HR-MS Calcd. For (C16H30O4Si+H)+ 315.1913, found 315.1892.

Workup

  1. customthe reaction
  2. customThe reaction was quenched with water
  3. extractionextracted with ethyl acetate (50 mL×2)
  4. washThe combined organic layers were washed with brine
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated under vacuum
  8. customThe residues were purified on silica gel column chromatography (10% EtOAc/Hexane)

Sources & evidence

ORD record
ord-be91ba92fcc04fbeb1333809ad9426c9
Source dataset
uspto-grants-2015_02
Patent number
US08946242B2

Reaction notes

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