1,3-Divinyltetramethyldisiloxane → 1-(2-Methylphenethyl)-3-vinyltetramethyldisiloxane

HRID 1463525Notes

Reaction equation

HRID 1463525 reaction equation
CC1C=CC=CC=1[CH2:4][CH2:5][Si:6]([CH3:21])([CH3:20])[O:7][Si:8]([CH3:19])([CH3:18])[CH2:9][CH2:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=1[CH3:17].C([Si](C)(C)O[Si](C)(C)C=C)=C>>[CH3:17][C:12]1[CH:13]=[CH:14][CH:15]=[CH:16][C:11]=1[CH2:10][CH2:9][Si:8]([CH3:19])([CH3:18])[O:7][Si:6]([CH3:20])([CH3:21])[CH:5]=[CH2:4]

Participants

3

Reactant 2

HCID 758191,3-DivinyltetramethyldisiloxaneHCID 190907011,3-Di(2-methylphenethyl)tetramethyldisiloxane

Product 1

HCID 190907021-(2-Methylphenethyl)-3-vinyltetramethyldisiloxaneYield 106.5%

Procedure

The following were charged to a 1 L roundbottom flask equipped with a stirrer and thermometer: 200 g 1.3-di(2-methylphenethyl)tetramethyldisiloxane as prepared in Example 3, 600 g 1,3-divinyltetramethyldisiloxane, and 5 g thoroughly dehydrated activated clay. This was followed by heating to 80° to 85° C. and stirring for 2 hours. The reaction mixture was then filtered and the filtrate was heated in vacuo to afford 160 g 1-(2-methylphenethyl)-3-vinyltetramethyldisiloxane.

Workup

  1. additionThe following were charged to a 1 L roundbottom flask
  2. customequipped with a stirrer
  3. temperatureby heating to 80° to 85° C.
  4. filtrationThe reaction mixture was then filtered
  5. temperaturethe filtrate was heated in vacuo

Sources & evidence

ORD record
ord-392f6971f6b046e2a0ac7f652f866230
Source dataset
uspto-grants-1994_04
Patent number
US05300669

Reaction notes

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