Imidazole → HCID 11391841, compound

To a stirred solution of triphenylphosphine (1.4154 g, 5.34 mmol) in anhydrous dichlormethane (20 mL) at room temperature under nitrogen was added imidazole (360 mg, 5.24 mmol), followed by iodide (1.2688 g, 4.95 mmol). The mixture was stirred for three minutes, a solution of 4-(tetrahydro-pyran-2-yloxy)-but-2-yn-1-ol (708.6 mg, 4.16 mmol) in dichloromethane was added dropwise via spring. The resulting mixture was continued to be stirred for 1.5 hours. The mixture was filtered through a pad of Celite. And the solid was washed with dichloromethane. The combined organic filtration was concentrated under reduced pressure. The residue was separated with flash column chromatography on silica using 0-20% EtOAc/hexane to afford 654 mg of product in 56% yield. 1H-NMR (CDCl3): δ 4.77 (t, J=3.0 Hz, 1 H), 4.33-4.18 (m, 2 H), 3.85-3.77 (m, 1 H), 3.70 (t, J=2.1 Hz, 2 H), 3.56-3.49 (m, 1 H), 1.85-1.62 (m, 6 H).

1. stirringto be stirred for 1.5 hours
2. filtrationThe mixture was filtered through a pad of Celite
3. washAnd the solid was washed with dichloromethane
4. filtrationThe combined organic filtration
5. concentrationwas concentrated under reduced pressure
6. customThe residue was separated with flash column chromatography on silica using 0-20% EtOAc/hexane

ORD record

ord-6c9cabfc9e114ae8bd15305792e65f90

Source dataset

uspto-grants-2013_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08389759B2