4-Methylpiperazine-1-ethylamine → 1-(6-Thiocyanato-1,3-benzothiazol-2-yl)-3-[2-(4-methylpiperazin-1-yl)ethyl]urea

Beteiligte Stoffe

Reaktionsschritte

The 1-(6-thiocyanato-1,3-benzothiazol-2-yl)-3-[2-(4-methylpiperazin-1-yl)ethyl]urea was prepared according to the method described in Example 9c, but using 982 mg of phenyl (6-thiocyanato-1,3-benzothiazol-2-yl)carbamate and 473 mg of 2-(4-methylpiperazin-1-yl)ethylamine. The residue obtained is chromatographed on a Merck cartridge (25 g of silica 15-40 μm), elution being carried out with a 90/10 mixture of dichloromethane/methanol. 1.13 g of 1-(6-thiocyanato-1,3-benzothiazol-2-yl)-3-[2-(4-methylpiperazin-1-yl)ethyl]urea are thus recovered in the form of a white solid, the characteristics of which are as follows:

Herkunft & Nachweise