Benzoyl chloride → HCID 86744951, compound

Participants

Reaction Conditions

Reaction Steps

The experiment is carried out as in Example 44, starting with 2-{3-[4-(2-oxo-1-benzimidazolinyl)piperidino]propyl}naphtho[1,8-cd]isothiazole 1,1-dioxide (4.6 g) in dimethylformamide (20 cc) and benzoyl chloride (1.4 g) in tetrahydrofuran (20 cc) and sodium hydride (0.48 g) as a 50% dispersion in vaseline oil. The mixture is stirred for 15 hours at a temperature of about 20° C. After purification by flash-chromatography on a silica column, under a current of argon at medium pressure (0.5-1.5 bar) with a dichloromethanemethanol (90-10 vol) mixture as eluant, and then recrystallization from a boiling acetone/ethanol (90-10 vol) mixture (60 cc), 2-{3-[4-(3-benzoyl-2-oxo-1-benzimidazolinyl)piperidino]propyl}naphto [1,8-cd]isothiazole 1,1-dioxide (2.9 g) is obtained, m.p. 133° C.

Provenance & Evidence