Wy 13876 → Tilomisole

Beteiligte Stoffe

Reaktionsschritte

3-(p-Chlorophenyl)-2,3-dihydro-3-hydroxythiazolo[3,2-a]-benzimidazole-2-acetic acid, (5.0 g.) is suspended in a solution of 100 ml. of a 6 N NCl and 200 ml. of dioxane. The mixture is heated at reflux for 18 hours. The solution is concentrated in vacuo to 50 ml. To the concentrate is added 200 ml. of water, and sufficient 4 N NaOH solution to dissolve all the solids. The alkaline solution is made acidic with acetic acid. The solid is collected, washed well with water and air-dried. The crude material is recrystallized from dimethoxyethane. The product (2.0 g.) melts at 242°-243° C.

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