Acetophenone → HCID 67384813, compound

To a solution of acetophenone (5.0 g, 41.6 mmol) in dry toluene (10 mL) was added LiHMDS (1.0 M in toluene, 42 mL, 42 mmol) via syringe at 0° C. under argon. After 5 min, 3-(methylthio)propanoyl chloride (5.77 g, 41.6 mmol) was added in one portion via syringe. The ice bath was removed and AcOH (5 mL), EtOH (100 mL), and hydrazine hydrate (6.25 g, 125 mmol) were added. The mixture was refluxed for 2 h, cooled to room temperature, and concentrated. The residue was partitioned between EtOAc and water, and the organic phase was washed with brine, dried over MgSO4, and concentrated. The resulting residue was purified by silica gel column chromatography to give the title compound as a pale yellow oil (6.5 g). LCMS m/z=219.2 [M+H]+; 1H NMR (400 MHz, DMSO-d6) δ ppm 2.09 (s, 3H), 2.77 (t, J=7.71 Hz, 2H), 2.84-2.95 (m, 2H), 6.53 (s, 1H), 7.18-7.50 (m, 3H), 7.63-7.84 (m, 2H), 12.60 (bs, 1H).

1. customThe ice bath was removed
2. temperatureThe mixture was refluxed for 2 h
3. concentrationconcentrated
4. customThe residue was partitioned between EtOAc and water
5. washthe organic phase was washed with brine
6. dry with materialdried over MgSO4
7. concentrationconcentrated
8. customThe resulting residue was purified by silica gel column chromatography

ORD record

ord-ccdd77db19254cf2a758792291a54533

Source dataset

uspto-grants-2015_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09012478B2