Chlorotrimethylsilane → 3,9-Dioxa-2,10-disilaundecane, 2,2,10,10-tetramethyl-

HRID 5056

Reaction equation

HRID 5056 reaction equation
[CH2:1]([OH:7])[CH2:2][CH2:3][CH2:4][CH2:5][OH:6].[CH3:8][Si:9](Cl)([CH3:11])[CH3:10]>C[Si](N[Si](C)(C)C)(C)C>[Si:9]([O:6][CH2:5][CH2:4][CH2:3][CH2:2][CH2:1][O:7][Si:9]([CH3:11])([CH3:10])[CH3:8])([CH3:11])([CH3:10])[CH3:8]

Participants

4

Reactant 2

HCID 6397ChlorotrimethylsilaneHCID 81051,5-Pentanediol

Product 1

HCID 1431753,9-Dioxa-2,10-disilaundecane, 2,2,10,10-tetramethyl-

Reagents, catalysts & solvents 1

HCID 13838HexamethyldisilazaneSolvent3×

Conditions

Temperature
50 °C

Procedure

1,5-Pentanediol (65 g, 0.62 mol) was placed in a 500 mL 3-necked RB flask and treated with 0.4 mL trimethylsilyl chloride. A portion of HMDS (ca. 20 mL) was added, and an exothermic reaction took place as the mixture became homogeneous. The remainder of the HMDS (130 mL, 0.71 mol total) was added at a controlled rate (ca. 3-5 mL/min), maintaining the reaction temperature at ca. 50° C. Heating was continued at 100° C. (1 h), and 150° C. (2.5 h). GC analysis (method 1) revealed excess HMDS and one product. Distillation provided 139 g of colorless oil, bp 47°-49° C./0.1 mm. 1H NMR (CDCl3): 3.60 (t, J=7Hz, 4H), 1.57 (m, 4H), 1.40 (m, 2H), 0.12 (s, 18H), consistent with the assigned structure.

Workup

  1. customan exothermic reaction
  2. temperatureHeating
  3. customwas continued at 100° C.
  4. custom(1 h), and 150° C. (2.5 h)
  5. distillationDistillation

Sources & evidence

ORD record
ord-8970a9cd79a34b338559a5f59227a0d1
Source dataset
uspto-grants-1993_09
Patent number
US05243025

Linked notes

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