Tributyltin Chloride → Tributyl[5-(1,3-dioxolan-2-yl)4-methylthien-2-yl]stannane

Temperatur

-60 °C

A mixture of 2-(3-methylthien-2-yl)-1,3-dioxolane (intermediate 75, 1.5 g) in tetrahydrofuran (50 ml), stirred at −60° C. under a nitrogen atmosphere, was treated drop-wise with 1.6M n-butyl lithium in hexanes (6.1 ml). The reaction mixture was stirred at this temperature for 1 hour and tributyltin chloride (2.6 ml) was added; stirring was continued at −60° C. for 1 hour and then the reaction allowed to warm to ambient temperature. After 18 hours the reaction mixture was diluted with diethylether and this mixture was extracted with water and the ether layer dried with brine and over magnesium sulfate. The product isolated after evaporation of the solvent was further purified by flash column chromatography using cyclohexane:ethyl acetate (50:1) as eluent to give the title compound as a yellow oil.

1. stirringThe reaction mixture was stirred at this temperature for 1 hour
2. stirringstirring
3. temperatureto warm to ambient temperature
4. extractionthis mixture was extracted with water
5. dry with materialthe ether layer dried with brine and over magnesium sulfate
6. customThe product isolated
7. customafter evaporation of the solvent
8. customwas further purified by flash column chromatography

ORD-Eintrag

ord-bdd6a74b4fde4fe1a64ca556ea6560a2

Quelldatensatz

uspto-grants-2006_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07091237B2