3,5-Dimethoxybenzaldehyde → 3,5-Dimethoxy-beta-methylstyrene oxide

HRID 1995707Notes

Reaction equation

HRID 1995707 reaction equation
[C:1]1([SH+]C2C=CC=CC=2)C=CC=C[CH:2]=1.[CH3:14][O:15][C:16]1[CH:17]=[C:18]([CH:21]=[C:22]([O:24][CH3:25])[CH:23]=1)[CH:19]=[O:20]>O1CCCC1>[CH3:25][O:24][C:22]1[CH:21]=[C:18]([CH:17]=[C:16]([O:15][CH3:14])[CH:23]=1)[CH:19]1[O:20][CH:1]1[CH3:2]

Participants

4

Reactant 2

HCID 817473,5-DimethoxybenzaldehydeHCID 22290449Diphenylsulfonium

Product 1

HCID 130604403,5-Dimethoxy-beta-methylstyrene oxide

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
-78 °C

Procedure

To a -78= C. solution of diphenylsulfonium ethylide (1.0 mole) in tetrahydrofuran (one liter) is slowly added 3,5-dimethoxybenzaldehyde (1.0 mole). The reaction mixture is stirred at -78° C. for 3 hours and then allowed to warm to room temperature. It is then added to ether-water and the ether phase separated. The ether phase is washed with water, dried (MgSO4) and evaporated. Fractional distillation of the residue gives the title product.

Workup

  1. temperatureto warm to room temperature
  2. customthe ether phase separated
  3. washThe ether phase is washed with water
  4. dry with materialdried (MgSO4)
  5. customevaporated
  6. distillationFractional distillation of the residue

Sources & evidence

ORD record
ord-b0b1da4a83a54b09bb5b823f935a27cd
Source dataset
uspto-grants-1983_09
Patent number
US04405626

Reaction notes

Loading…