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Product Name:Diethyl ethoxymethylenemalonate
Synonyms:Ethoxymethylene Malonate Ester;Diethylethoxmethylenemalonate;Diethyl ethoxymethylenemalonate, 98+%;Ethyl α-carbethoxy-β-ethoxy acrylate;Diethyl ethoxymethylenemalonate, 99+%;ETHOXYMETHYLENE MALONIC ESTER(EMME);ETHOXYMETHYLENEMALONICACIDDIETHYLESTER(E.M.M.E);Diethylethoxymethylenmalonat
CAS:87-13-8
MF:C10H16O5
MW:216.23
EINECS:201-725-7
Mol File:87-13-8.mol
87-13-8

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Likely 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.]

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