Pyridine → HCID 59128681, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 25 (60 mg, 0.132 mmol), n-propanethiol (21.1 mg, 0.264 mmol), copper (II) acetate (36 mg, 0.198 mmol), pyridine (32 μL, 0.396 mmol) and 4A molecular sieves (50 mg) in DMF (1.5 mL) were heated at 110° C. for 25 h. More n-propanethiol (21.1 mg, 0.264 mmol), copper (II) acetate (36 mg, 0.198 mmol) and pyridine (32 μL, 0.396 mmol) were added and heating continued for 20.5 h. More n-propanethiol (21.1 mg, 0.264 mmol), copper (II) acetate (36 mg, 0.198 mmol), pyridine (32 μL, 0.396 mmol) and 4A sieves were added again and the heating continued at 130° C. overnight. The reaction mixture was cooled, diluted with AcOEt, filtered and washed with brine. The aqueous layer was extracted with AcOEt (2×), and the combined organic extracts dried (MgSO4) and concentrated. The residue was purified by preparative LCMS (column LUNA 10 μ C18(2) 00G-4253-V0 250×50 mm) using water—acetonitrile (0.1% AcOH) as eluent (in gradient; flow 80 mL/min) to give 26 as an orange oil (6.7 mg, 13%); 1H NMR (400 MHz, CDCl3) δ-0.056 (s, 9H), 0.93 (t, J=8.3 Hz, 2H), 1.00 (t, J=7.3 Hz, 3H), 1.61 (sextet, J=7.4 Hz, 2H), 2.84 (t, J=7.3 Hz, 2H), 3.57 (t, J=8.3 Hz, 2H), 4.00 (s, 3H), 5.68 (s, 2H), 7.43 (s, 1H), 7.64 (s, 1H), 7.76 (s, 1H), 8.15 (d, J=2.0 Hz, 1H), 8.45 (d, J=2.0 Hz, 1H).

Provenance & Evidence