Diisopropylamine → 2-(3-Hydroxy-1-azabicyclo[2.2.2]oct-3-yl)acetic acid t-butyl ester

Temperatur

-78 °C

To a 0° C. solution of diisopropylamine (6.7 ml) in tetrahydrofuran (THF) (20 ml) was added 2.3M nBuLi (20 ml). The reaction mixture was stirred for 40 minutes and then cooled to -78° C. To this mixture was added dropwise a solution of t butylacetate (6.4 ml) in 10 ml of THF and stirring continued for an additional 15 minutes. Quinuclidin-3-one (free base) (5.0 g) in THF (15 ml) was added to the mixture dropwise and the mixture was allowed to warm to 0° C. over 1 hour. To this solution was added water (100 ml), the solution was extracted twice with chloroform and the combined extracts were washed once with brine. The resulting solution was dried over MgSO4, filtered and dried in vacuo to give 9.53 g of the subtitle compound as an off-white solid.

1. stirringstirring
2. waitcontinued for an additional 15 minutes
3. temperatureto warm to 0° C. over 1 hour
4. extractionthe solution was extracted twice with chloroform
5. washthe combined extracts were washed once with brine
6. dry with materialThe resulting solution was dried over MgSO4
7. filtrationfiltered
8. customdried in vacuo

ORD-Eintrag

ord-2ba38bd6ef0b4c2ca5f565ac8defdc50

Quelldatensatz

uspto-grants-1999_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05902814