Isopropanol → Zinc i-propoxide, 99%

A 0.1 M solution of diethylzinc in heptane (40 ml, Aldrich) was transferred into a 500-ml three-neck round bottom flask equipped with a thermometer, addition funnel, magnetic stirring and a Liebig condenser attached to argon-vacuum line. Anhydrous isopraponol (6 ml, Aldrich) was slowly added under vigorous stirring. Additional 50 ml of anhydrous isopropanol were added and the mixture was refluxed for 1 hour. Volatiles were removed under reduced pressure affording white crystalline zinc isopropoxide, which was dried under vacuum at 80° C. for an hour. Dry cyclohexane (250 ml) was added into the flask, and the solid quickly dissolved. The mixture was heated to 55-60° C., and 17.0 g of acetoxypentamethyldisiloxane (82 mmol) in 50 ml of dry cyclohexane was added dropwise during 1 hour under vigorous stirring. The mixture was heated to 55-60° C. for additional 2 hours and was allowed to cool to room temperature. Volatiles were removed under reduced pressure. A solid waxy residue was dried under vacuum at 50° C., then was transferred into a sublimation apparatus, and was sublimed at 110° C./0.02 torr to afford 9.7 g of white solid Zn(OSi(CH3)2OSi(CH3)3)2.

1. customequipped with a thermometer, addition funnel
2. additionAnhydrous isopraponol (6 ml, Aldrich) was slowly added under vigorous stirring
3. temperaturethe mixture was refluxed for 1 hour
4. customVolatiles were removed under reduced pressure

ORD record

ord-458ea8a238e9407891e2b1f170888a7a

Source dataset

uspto-grants-2013_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08404877B2