反应详情

A solution of 2-[(2-guanidinothiazol-4-yl)methylthio]ethylamine (from the dihydrochloride, 20.0 g; 66.0 mmoles) [prepared according to the procedure described in South Africa Pat. No. 78/2129] and 1,1-bis(methylthio)-2-nitroethylene [prepared according to the procedure described in Chem. Ber., 100, 591 (1967) or Acta Chem. Scand., 21 2797 (1967)] (10.9 g; 66.0 mmoles) in isopropanol (600 ml) was stirred at ambient temperature under a positive pressure of nitrogen for 2 hours, at reflux temperature for 1 hour and then at ambient temperature for 54 hours. The reaction mixture was cooled and filtered to give 15.8 g of 1-nitro-2-methylthio-2-{2-[(2-guanidinothiazol-4-yl)methylthio]ethylamino}ethylene as a yellow solid, mp 151°-156°, which was used without further purification in Step B below.

1. custom66.0 mmoles) [prepared
2. temperatureat reflux temperature for 1 hour
3. temperatureThe reaction mixture was cooled
4. filtrationfiltered