Triphenylphosphine → (S)-Tert-butyl 2-(((5-bromopyridin-3-YL)oxy)methyl)azetidine-1-carboxylate

Triphenylphosphine (4.01 g, 15.3 mmol) and DEAD (2.43 mL, 15.3 mmol) were dissolved in 30 mL of THF at 0° C., and the mixture was stirred for for 10 minutes. Samples of 1-BOC-2-(S)-azetidinemethanol (2.86 g, 15.3 mmol), prepared as described above, and 5-bromo-3-hydroxypyridine (1.505 g, 10.2 mmol) were added, and the reaction rnixture was stirred for 40 hours at room temperature. The volatiles were removed under vacuum, and the residue was triturated with hexane. The hexane was removed, and the residue was chromatographed on a silica gel column, eluting with hexane:Et2O 10:1 to 10:2 to afford the title compound as a colorless oil (1.669 g). MS (CI/NH3) m/z 344 (M+H)+. 1H NMR (CDCl3, 300 MHz) δ1.42 (s, 9H), 2.31 (m, 2H), 3.89 (m, 2H), 4.12 (m, 1H), 4.322 (m, 1H), 4.52 (m, 1H), 7.43 (m, 1H), 8.29 (m, 2H).

1. additionwere added
2. stirringthe reaction rnixture was stirred for 40 hours at room temperature
3. customThe volatiles were removed under vacuum
4. customthe residue was triturated with hexane
5. customThe hexane was removed
6. customthe residue was chromatographed on a silica gel column
7. washeluting with hexane:Et2O 10:1 to 10:2

ORD-Eintrag

ord-2199bd41981b475f8f119f432e08d0de

Quelldatensatz

uspto-grants-2000_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06127386