hydroxylamine-O-sulfonic acid → HCID 11999273, compound

Participants

Reaction Steps

To a stirred solution of Example 48 (1.00 g, 3.77 mmol) in formic acid (40 mL) was added, dropwise, hydroxylamine-O-sulfonic acid (0.64 g, 5.66 mmol). After refluxing overnight the reaction mixture was quenched with ice/water and neutralised with aqueous 5% NaOH and then extracted with DCM (2×40 μL). The organics were combined, dried (MgSO4), filtered and concentrated in vacuo. Purification by column chromatography (SiO2, 3:1 DCM/EtOAc) gave the title compound (0.24 g, 22%) as an off-white solid. δH (DMSO-d6) 10.77 (1H, s), 3.69 (4H, m), 3.42 (4H, m), 2.52 (2H, s), 2.25 (2H, s), 0.98 (6H, s). LCMS (ES+) 282.0 (M+H)+.

Provenance & Evidence