Ethanol → HCID 54380916, compound

Participants

Reaction Steps

41.6 g (0.4 mole) hydrazinoformic acid ethyl ester are dissolved in 120 ml ethanol in a three necked 250 ml round flask with stirrer and temperature indicator and 39.2 g (0.4 mole) propiolic acid ethyl ester are added. The temperature rises to 30° C. during the addition and is kept constant for another three hours. After standing over night at room temperature the contents is thickened by evaporation at 40° C. in vacuo. The yellow oily residue crystallizes upon grinding. The crystals are ground with a mixture of 60 ml isopropylether and 60 ml cyclohexane, are sucked off, washed with 100 ml cyclohexane and are dried at room temperature in vacuo to constant weight.

Provenance & Evidence