4-Amino-1-Boc-piperidine → (S)-tert-butyl 4-(2-(6-bromopyridin-3-yloxy)-4-hydroxybutanamido)piperidine-1-carboxylate

To a solution of tert-butyl 4-aminopiperidine-1-carboxylate (0.93 g, 4.65 mmol) in DCM (15 mL) was added dropwise 2M trimethylaluminum (2.8 mL, 5.7 mmol) in toluene. The resulting mixture was stirred for 15 minutes, and (S)-3-(6-bromopyridin-3-yloxy)dihydrofuran-2(3H)-one (1.0 g, 3.87 mmol) in DCM (10 mL) was added slowly over 5 minutes and the reaction stirred at ambient temperature for 2 hours. The reaction was slowly quenched by the addition of 5% tartaric acid (5 mL), saturated NaHCO3 (5 mL) and DCM (10 mL). The organic layer was separated, dried over MgSO4, filtered and concentrated in vacuo to provide (S)-tert-butyl 4-(2-(6-bromopyridin-3-yloxy)-4-hydroxybutanamido)piperidine-1-carboxylate. The crude material was taken on without a further purification.

1. stirringthe reaction stirred at ambient temperature for 2 hours
2. customThe reaction was slowly quenched by the addition of 5% tartaric acid (5 mL), saturated NaHCO3 (5 mL) and DCM (10 mL)
3. customThe organic layer was separated
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo

ORD-Eintrag

ord-485708134a8a40eaac525a8478d814e0

Quelldatensatz

uspto-grants-2014_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08754226B2