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Diethyl ethoxymethylenemalonate

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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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  • Company Name:Shandong Deju Renhe chemical raw materials Co., Ltd
  • Tel: 15253208962
  • Products Intro:Product Name:Diethyl ethoxymethylenemalonate
    CAS:87-13-8
    Purity:99% HPLC Package:200KG
  • CB Index:58
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  • Products Intro:Product Name:Diethyl ethoxymethylenemalonate
    CAS:87-13-8
    Purity:99 Package:1000KG Remarks:100KG
  • CB Index:58
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  • Company Name:Nanjing Yihua Biotechnology Co., Ltd
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  • Products Intro:Product Name:Diethyl 2-(ethoxymethylene)malonate
    CAS:87-13-8
    Purity:99% Package:5kg;25kg;200kg
  • CB Index:58
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  • Company Name:J & K SCIENTIFIC LTD.
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  • Products Intro:Product Name:Diethyl ethoxymethylenemalonate, 98%
    CAS:87-13-8
    Purity:98% Package:100G;25G;500G More...
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  • Products Intro:Product Name:1,3-diethyl 2-(ethoxymethylidene)propanedioate
    CAS:87-13-8
    Purity:97% Package:1G;5G;10G;100G;250G
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  • Company Name:Meryer (Shanghai) Chemical Technology Co., Ltd.
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  • Products Intro:Product Name:Diethyl ethoxyMethyleneMalonate
    CAS:87-13-8
    Purity:99+% Remarks:11434 More...
  • CB Index:62
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