Water → HCID 57321242, compound

HRID 2295075Notes

Reaction equation

HRID 2295075 reaction equation
[OH:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:8][CH:9]=[CH2:10].C(=O)([O-])[O-].[K+].[K+].[CH2:17](Br)[CH:18]=[CH2:19].O>CC(C)=O>[CH:17]([O:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:8][CH:9]=[CH2:10])=[CH:18][CH3:19]

Participants

6

Reactant 4

HCID 962WaterHCID 7841Allyl bromideHCID 11430Potassium CarbonateHCID 156242-Allylphenol

Product 1

HCID 57321242HCID 57321242, compoundYield 98.7%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

200 g of 3-(2-hydroxyphenyl)propene, 226 g of potassium carbonate and 180 g of allyl bromide were stirred in 490 ml of acetone at reflux temperature for hours and then cooled. One liter of water was added and the resultant layers were separated. The aqueous layer extracted with two volumes of diethyl ether, dried and stripped of solvent to give 256 g of 3-(2-propenyloxyphenyl)propene which was subsequently rearranged as described in Example 56 to the 2,6-di-propenylphenol intermediate. 52.2 g of said intermediate was dissolved in 500 ml of THF and chilled to -5° C. 300 ml of one molar borane was added over 15 minutes (maximum temperature not exceeding 18° C.), after which the mixture was stirred for 36 hours and chilled to 0° C. 80 ml of water was added over a 5 minute period, after which 120 ml of 5N sodium hydroxide was added all at once. When the temperature of the reaction mixture reached 1° C., 81 ml of 30% hydrogen peroxide was added over a 25 minute period and the mixture stirred for one hour and then concentrated. An additional 500 ml of water and 250 ml of ethyl acetate were added which, following workup, gave about 54 g of the desired 2,6-di(3-hydroxypropyl)-phenol intermediate, m.p. 176°-187° C.

Workup

  1. temperatureat reflux temperature for hours
  2. temperaturecooled
  3. customthe resultant layers were separated
  4. extractionThe aqueous layer extracted with two volumes of diethyl ether
  5. customdried

Sources & evidence

ORD record
ord-b01495cf09004aef8f88ef65866b4fb9
Source dataset
uspto-grants-1997_11
Patent number
US05691367

Reaction notes

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