Phosphorus oxychloride → HCID 20434340, compound

Participants

Reaction Steps

19 parts of the potassium salt of 2-cyano-3-hydroxy-N-methylmaleimide (prepared by a method similar to that for the salts described in J.Amer.Chem.Soc. 80 (1958), 3924) and 15.3 parts of phosphorus oxytrichloride in 100 parts by volume of heavy naphtha are heated at the boil for half an hour, the hot mixture is then filtered, the filtrate is allowed to cool, and the resulting precipitate is filtered off under suction, washed with gasoline and dried. 9.6 parts (56% of theory) of 2-cyano-3-chloro-N-methylmaleimide of melting point 141°-143° C. are obtained. IR (KBr): 2270, 1720, 1630 cm-1.

Provenance & Evidence