Tributylstannane → Tributyl(ethoxymethyl)stannane

Temperatur

-78 °C

To a mixture of diisopropylamine (2.1 mL, 15 mmol) and tetrahydrofuran (30 mL) was added dropwise n-butyl lithium (2.4 M n-hexane solution, 5.0 mL, 12 mmol) at −78° C., and then the reaction mixture was stirred for 30 minutes. Tributyltin hydride (3.3 mL, 12 mmol) was added dropwise to this mixture at −78° C., and then the reaction mixture was stirred for 40 minutes at 0° C. The reaction mixture was cooled to −78° C., after which ethoxymethyl chloride (1.1 mL, 12 mmol) was added dropwise to the reaction mixture. The reaction mixture was raised to room temperature, diethyl ether and an ammonium chloride aqueous solution were added to the reaction mixture, and the organic layer was separated. The organic layer was washed with saturated aqueous sodium chloride, after which the organic layer was concentrated under a reduced pressure. The residue was purified by neutral silica gel column chromatography (heptane:diethyl ether=30:1) to obtain the title compound (2.8 g, 66%).

1. stirringthe reaction mixture was stirred for 40 minutes at 0° C
2. temperatureThe reaction mixture was raised to room temperature
3. customthe organic layer was separated
4. washThe organic layer was washed with saturated aqueous sodium chloride
5. concentrationafter which the organic layer was concentrated under a reduced pressure
6. customThe residue was purified by neutral silica gel column chromatography (heptane:diethyl ether=30:1)

ORD-Eintrag

ord-f3094ea4a454454ab420ec52a3459d4f

Quelldatensatz

uspto-grants-2010_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07691882B2