Stannous chloride dihydrate → HCID 86704004, compound

Participants

Reaction Steps

A mixture of 4-(1-methylpiperidin-4-yloxy)-8-(3-nitrophenyl)-2-phenyl-9,10-dihydro-4H-3,10a-diaza-benzo[f]azulene (example 242 B) (0.6 mmole), tin(II) chloride dihydrate (2.83 g) in ethanol (15 mL) is refluxed for 2 hours. The mixture is then cooled to room temperature and extracted twice with chloroform. Pooled organic extracts are dried over magnesium sulphate, filtered and the solvent is removed under reduced pressure. The residue is purified by preparative HPLC-MS (Waters AutoPurification HPLC/MS System, Sunfire Prep C18 5 μm OBD 30×150 mm column, eluents: water/0.1% formic acid (A) and acetonitrile/0.1% formic acid (B), focus gradient from 14% (B) to 24% (B) in 10 minutes) to afford 3-[4-(1-methylpiperidin-4-yloxy)-2-phenyl-9,10-dihydro-4H-3,10a-diaza-benzo[f]azulen-8-yl]-phenylamine melting at 120° C.

Provenance & Evidence