Propargyl bromide → Heptopargil

HRID 1389408Notes

Reaction equation

HRID 1389408 reaction equation
[Na].[CH3:2][C:3]12[C:9]([CH3:11])([CH3:10])[CH:6]([CH2:7][CH2:8]1)[CH2:5][C:4]2=[N:12][OH:13].[CH2:14](Br)[C:15]#[CH:16]>CO>[CH2:16]([O:13][N:12]=[C:4]1[CH2:5][CH:6]2[C:9]([CH3:10])([CH3:11])[C:3]1([CH3:2])[CH2:8][CH2:7]2)[C:15]#[CH:14]

Participants

5

Reactant 3

HCID 7842Propargyl bromideHCID 26110Camphor oximeHCID 5360545Sodium

Product 1

HCID 52692HeptopargilYield 81%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

4.6 g (0.2 moles) of metallic sodium are dissolved in 200 ml of methanol, and 33.4 g (0.2 moles) of (±)-1,7,7-trimethyl-bicyclo[2,2,1]heptane-2-one-oxime are added to the solution. After one hour of boiling 23.8 g (0.2 moles) of propargyl bromide are introduced, and the reaction is continued for a further hour. The mixture is cooled, the separated sodium bromide is filtered off, the filtrate is concentrated, and the concentrate is subjected to fractional distillation in vacuo. 33.2 g (81%) of (±)-2-(propargyloxyimino)-1,7,7-trimethyl-bicyclo[2,2,1]heptane are obtained as a light yellow oil; b.p.: 94° C./1.5 mm Hg, nD20 =1.4955.

Workup

  1. waitthe reaction is continued for a further hour
  2. temperatureThe mixture is cooled
  3. filtrationthe separated sodium bromide is filtered off
  4. concentrationthe filtrate is concentrated
  5. distillationthe concentrate is subjected to fractional distillation in vacuo

Sources & evidence

ORD record
ord-b639f6dc1b3044a8833c16a1689a1b41
Source dataset
uspto-grants-1981_01
Patent number
US04244888

Reaction notes

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