Iodine → HCID 76849761, Verbindung

To a stirred solution of 8-chloro-imidazo[1,5-a]pyrazine (200.00 mg, 1.30 mmol) in THF (10.0 mL) was slowly added n-BuLi in hexane (2.5 M, 0.62 mL, 1.55 mmol) at −78° C. under nitrogen. The resulting mixture was stirred at the same temperature for 15 min. Then to this mixture a solution of iodine (429.7 mg, 1.693 mol) in 3 mL of THF was slowly added. The mixture was allowed to warm up to 30° C. in 1 hour. Reaction was quenched by 2 mL saturated aq. solution of NH4Cl. The reaction mixture was extracted with DCM. The solvent was removed under reduced pressure and the residue was used in next step without further purification. 1H NMR (400 MHz, CDCl3) δ 7.48 (d, J=5.05 Hz, 1H), 7.71 (dd, J=5.05, 1.01 Hz, 1H), 7.94 (d, J=1.01 Hz, 1H). MS (ES+): m/z 279.86/281.90 [MH+]; HPLC: tR=2.70 min (OpenLynx, polar—5 min).

1. customat −78° C.
2. customReaction
3. customwas quenched by 2 mL saturated aq. solution of NH4Cl
4. extractionThe reaction mixture was extracted with DCM
5. customThe solvent was removed under reduced pressure
6. customthe residue was used in next step without further purification
7. customHPLC: tR=2.70 min (OpenLynx, polar—5 min)

ORD-Eintrag

ord-b439345bbed34997900af48066a6e0e1

Quelldatensatz

uspto-grants-2013_07

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08481733B2