Diethanolamine → HCID 69083998, compound

Participants

Reaction Conditions

Reaction Steps

Crude 1-chloro-4-(3-iodopropoxy)-9H-thioxanthen-9-one (10.0 g; 23.22 mmol) from the previous step was slowly charged into a solution of diethanolamine (14.65 g; 139.3 mmol) in acetonitrile (100 mL) heated to 50° C. The reaction mixture was stirred vigorously and heated to 50° C. for 60 h. The solvent was removed in vacuo and water (500 mL) was added. The mixture was extracted with dichloromethane (3×250 mL). The aqueous phase was discarded and the organic phase was extracted with hydrochloric acid (2M, 3×100 mL). The pH of the strongly acidic aqueous phase was adjusted to 12-13 by slow addition of 50% aq. NaOH to reprecipitate the product. The aqueous phase was reextracted with dichloromethane (4×100 mL), the organic phase dried (MgSO4), evaporated to give 4-{3-[bis(2-hydroxyethyl)amino]propoxy}-1-chloro-9H-thioxanthen-9-one (5.31 g; 56% yield).

Provenance & Evidence