ChemicalBook CAS DataBase List Divinyltetramethyldisiloxane

Divinyltetramethyldisiloxane synthesis

10synthesis methods

Product Name:Divinyltetramethyldisiloxane
CAS Number:2627-95-4
Molecular formula:C8H18OSi2
Molecular Weight:186.4

The patent reports a method for preparing tetramethyldivinyldisiloxane, comprising the following steps: (1) mixing tetramethyldihydrogendisiloxane with a chloroplatinic acid catalyst to obtain a mixed solution; (2) bubbling acetylene into the mixed solution to carry out a hydrosilylation reaction, and after the reaction is completed, separating and purifying the reaction solution to obtain Divinyltetramethyldisiloxane.

1066-35-9 Synthesis

1066-35-9
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1719-58-0 Synthesis

1719-58-0
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$45.00/1mL

3277-26-7 Synthesis

3277-26-7
406 suppliers
$13.00/5G

2627-95-4
345 suppliers
$16.80/25G

55967-52-7
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Yield:55967-52-7 62 %Chromat. ，3277-26-7 11 %Chromat. ，2627-95-4 26 %Chromat.

Reaction Conditions:

in water at 0 - 20;

Steps:

5 Synthesis of Vinyltetramethydisioxane

Vinyitetramethyldisiloxane (12) was prepared according to the following reaction: where 13 and 14 are byproducts (in addition to 1 ,1,3,3-tetramethy disiioxane). The chemical names, corresponding structures, and numerical abbreviations used below are given in TABLE 3, (0069) TABLE 3 (0070) [0045] A 250 mL 3-neck RB flask equipped with a stir bar was connected to an addition funnel and a base scrubber. A mixture of dimethyvinychorosiane (50.0 g, 0.41 mol) and dimethyehorosiane (39.2 g, 0.41 mol, 1 equiv.) was loaded into the addition funnel. The RB flask was charged with Di water (67 g), immersed in an ice/water bath, and allowed to cool down to 0 °C. Chorosianes were added dropwise into water upon vigorous stirring at a rate that kept the reaction temperature under 20 °C. The reaction mixture was stirred at 20 °C for 5 min after addition of chlorosilanes, (0071) [0046] The sioxane layer (top) was separated, washed with sat, NaHCOa solution (3 x 67 mL, stirred for 20 min each wash), EbO (67 mL), dried over MgSCA (1.5 g), and filtered to generate a colorless, clear liquid (56.8 g), GC analysis showed that the crude product was composed of vlnyitetramethydisioxane (62%), 1,1,3,3-tetramethyidisiioxane (11%), and 1,3-divinyi-i, 1,3,3- teirameihydisioxane (26%). GG analysis showed no detection of vlnyldimethylsianoi.

References:

WO2021/119437,2021,A1 Location in patent:Paragraph 0044-0046

3277-26-7 Synthesis

3277-26-7
406 suppliers
$13.00/5G