反应详情

A mixture of 5.85 g indole in 50 ml methanol and 5.8 g 1-methyl-2-imidazolidinethione in 100 ml methanol is treated with a solution of 12.7 g of iodine and 25 g potassium iodide in 100 ml water. The mixture is stirred for 2 hours at room temperature, the clear solution is concentrated in vacuo to one third of the original volume and cooled. The solid which separates is filtered off and recrystallized from a mixture of methanol and ethyl acetate to give 3-(1-methyl-2-imidazolin-2-ylthio)-indole hydriodide melting at 215°-216°.

1. concentrationthe clear solution is concentrated in vacuo to one third of the original volume
2. temperaturecooled
3. filtrationThe solid which separates is filtered off
4. customrecrystallized from a mixture of methanol and ethyl acetate