ChemicalBook CAS DataBase List Hexaethylene glycol

Hexaethylene glycol synthesis

12synthesis methods

Product Name:Hexaethylene glycol
CAS Number:2615-15-8
Molecular formula:C12H26O7
Molecular Weight:282.33

211746-78-0
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2615-15-8
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Yield:2615-15-8 79%

Reaction Conditions:

with lithium aluminium tetrahydride in tetrahydrofuran at -10 - 20; for 3 h;Time;

Steps:

1 A method for preparing organic intermediate hexaethylene glycol

The purified compound A was dissolved in 3900 mL of tetrahydrofuran and cooled to -10 ° C. 45 g of lithium aluminum hydride was added in two portions, and the reaction was carried out at 0 ° C for 3 hours. heated to room temperature, the reaction overnight; after the completion of the reaction by adding 2000mL water quenching the excess lithium aluminum hydride, dichloromethane extraction of small polar impurities 2 times, of which each time the amount of dichloromethane about 1470mL;to retain the aqueous phase, adding 295g 731 cation exchange resin to pH neutral; filter to the resin, the water was concentrated under reduced pressure. The reaction yield of the compound A obtained by the step (5) in the production method of the present invention is 79%The reaction yield of the final organic intermediate hexaethylene glycol was 79%.

References:

CN106045826,2016,A Location in patent:Paragraph 0014; 0015