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Diethyl ethoxymethylenemalonate

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Diethyl ethoxymethylenemalonate Basic information
Diethyl ethoxymethylenemalonate Chemical Properties
Safety Information
  • Hazard Codes Xn
  • Risk Statements 22-36/37/38-42/43
  • Safety Statements 26-36/37/39-27-24/25
  • WGK Germany 1
  • RTECS OO1100000
  • Autoignition Temperature215 °C
  • TSCA Yes
  • HS Code 29189090
  • ToxicityLD50 orally in Rabbit: 925 mg/kg LD50 dermal Rat > 2000 mg/kg
Diethyl ethoxymethylenemalonate Usage And Synthesis
  • UsesIntermediate in the production of Flumequine
  • Safety ProfileModerately toxic by ingestion. A skin irritant. A combustible liquid. When heated to decomposition it emits acrid smoke and irritating fumes.
  • Purification MethodsLikely impurity is diethyl diethoxymethylene malonate which is difficult to separate from diethyl ethoxymethylene malonate by distillation, and it is necessary to follow the course of the distillation by the change in refractive index instead of boiling point. After a low boiling fraction is collected, there is obtained an intermediate fraction (n 20 1.414—1.458), the size of which depends on the amount of the diethoxymethylene compound. This fraction is fractionated through a 5inch Vigreux column (p 11) at low pressure avoiding interruption in heating. Fraction b 108-110o/0.25mm is ca 10o lower than the submitters' fraction (b 97.2o/0.25mm, n D 1.4612—1.4623) [Org Synth Coll Vol III 395 1955, Fuson et al. J Org Chem 11 197 1946, Duff & Kendal J Chem Soc 893 1948]. [Beilstein 3 IV 1192.]
Diethyl ethoxymethylenemalonate Preparation Products And Raw materials
Diethyl ethoxymethylenemalonate (87-13-8)Related Product Information
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