反应详情

A mixture of 1,2-epoxy-3-(indol-4-yloxy)propane (0.67 g.), 3,5-diamino-6-chloro-N-(2-aminoethyl)pyrazine-2-carboxamide (1.63 g.) and isopropanol (50 ml.) were refluxed together under nitrogen until thin layer chromatography indicated all of the epoxy compound had reacted (about 3 hours). The solvent was removed by rotary evaporator and the resulting yellow solid was chromatographed on silica gel with a 5:1 mixture of chloroform:methanol to give 1.03 g. of product. This material was dissolved in methanol (110 ml.) with warming and the solution was added to oxalic acid (1 equivalent) in methanol (20 ml.). Upon concentration and cooling of the solution, there was obtained 3,5-diamino-6-chloro-N-2-(2-hydroxy-3-indol-4-yloxy-propylamino)ethyl-pyrazine-2-carboxamide oxalate, m.p. 214°-216° C. with decomposition.

1. temperaturewere refluxed together under nitrogen until thin layer chromatography
2. customhad reacted (about 3 hours)
3. customThe solvent was removed by rotary evaporator
4. customthe resulting yellow solid was chromatographed on silica gel with a 5:1 mixture of chloroform
5. custommethanol to give 1.03 g
6. temperaturewith warming
7. concentrationUpon concentration
8. temperaturecooling of the solution