Pyridine → 1-Azabicyclo[2.2.2]oct-3-yl methanesulfonate

Temperatur

0 °C

Quinuclidin-3-ol (10.0 g, 0.0787 mol) was dissolved under N2 in dry dichloromethane (200 ml) and cooled in an ice bath to 0° C. Methanesulphonyl chloride (7.3 ml, 10.8 g, 0.094 mol, 1.2 eq) and dry pyridine (7.64 ml, 7.46 g, 0.094 mol, 1.2 eq) were added and the mixture stirred at 0° C. for 20 min. The solution was then warmed to r.t. and stirred under N2 for 1 h. Saturated aqueous potassium carbonate solution (150 ml) was added, and the organic layer extracted and collected. The aqueous layer was re-extracted with EtOAc (3×200 ml), the organic solutions dried (Na2SO4), filtered, and evaporated to dryness under reduced pressure to yield a pale yellow oil which was pumped under high vacuum to remove any last traces of pyridine to yield the title compound (D8) (15.8 g, 98%).

1. temperatureThe solution was then warmed to r.t.
2. stirringstirred under N2 for 1 h
3. extractionthe organic layer extracted
4. customcollected
5. extractionThe aqueous layer was re-extracted with EtOAc (3×200 ml)
6. dry with materialthe organic solutions dried (Na2SO4)
7. filtrationfiltered
8. customevaporated to dryness under reduced pressure
9. customto yield a pale yellow oil which
10. customto remove any last traces of pyridine

ORD-Eintrag

ord-d15517aea070493592fcd55d6678db75

Quelldatensatz

uspto-grants-1999_11

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05981545