反应详情

A solution of 0.5 g of 2-tert-butyl-5-(4-methyl-piperidin-1-yl)-6-phenoxythiocarbonylaminobenzothiazole and 0.11 g of 4-methylpiperazine in 20 ml of dioxane is refluxed for 16 hours. Evaporation of the solvent and chromatography of the residue over silica gel and elution with methylene dichloride-methanol (98:2) gives 2-tert-butyl-6-[(4-methylpiperazin-1-yl)thiocarbonylamino]-5-(4-methylpiperidin-1-yl)benzothiazole, identical with the compound described in Example 1.

1. customEvaporation of the solvent and chromatography of the residue
2. washover silica gel and elution with methylene dichloride-methanol (98:2)