(-)-Diethyl tartrate
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(-)-Diethyl tartrate
structure -
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CAS No:
13811-71-7
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Formula:
C8H14O6
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Chemical Name:
(-)-Diethyl tartrate
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Synonyms:
Butanedioic acid,2,3-dihydroxy-,1,4-diethyl ester,(2S,3S)-;Butanedioic acid,2,3-dihydroxy-,diethyl ester,[S-(R*,R*)]-;Tartaric acid,diethyl ester,(-)-;D-Tartaric acid diethyl ester;(-)-Diethyl tartrate;Diethyl D-tartrate;Diethyl (2S,3S)-(-)-tartrate;Diethyl D-(-)-tartrate;Diethyl (S,S)-(-)-tartrate;D-(-)-Diethyl tartrate;(S,S)-Diethyl tartrate;Diethyl (-)-D-tartrate;(2S,3S)-Diethyl tartrate;D-Diethyl tartarate;D-Ethyl tartrate;(-)-Diethyl D-tartarate;D-(-)DET;D-(-)-Tartaric acid diethyl ester
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CAS No:
Characteristics
93.1
-0.3
white crystals
1.3±0.1 g/cm3
17ºC
126-127 °C @ Press: 2 Torr
93.3±0.0 °C
1.471
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
0.000467mmHg at 25°C
Safety Information
3
R36/37/38
S24/25
Xi: Irritant;
Stable under normal temperatures and pressures.
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
H315
(-)-Diethyl tartrate Use and Manufacturing
[Refining procedures of 1st]: in a thermometer is arranged, is put in a flask of agitator D-tartaric acid (malic acid 0.20percent, fumaric acid 0.07percent) 60.0g and ethanol 36.0g, in 10 °C lower stirring 2 hours later, through the filter recovery D-tartaric acid 48.1 g. [Process 1st]: the [of the refining procedures of 1st] D-tartaric acid in dry, add ethanol 28.8g, by adding 35percent hydrochloric acid 1.9g, in 80 °C to enable its reaction under. Next, in the 70 °C the following concentrate, before adding the same quantity of ethanol and 35percent hydrochloric acid, to concentrate similarly after the reaction. Recognizing the moisture 0.1 weight percent, to obtain 1st esterification reaction liquid. [Process 2nd]: 1st the obtained in the esterification reaction solution before the addition of ethanol to stir the same, then adding thionyl chloride 11.4g, in 30-40 °C to enable its reaction under. Concentration is carried out, to obtain 2nd esterification reaction liquid. [Process 3rd]: 2nd the esterification reaction solution of sodium bicarbonate and in the rear, to filter the obtained filtrate is concentrated (D-tartaric acid diethyl ester which yield 97percent). Finally, under reduced pressure, through the thin film distillation (heat medium temperature 145 °C) separating D-diethyl tartrate of the optical purity is 99.8percent ee, malic acid diethyl ester and fumaric acid diethyl ester content is less than 0.01percent. Furthermore, sulfurous acid diethyl ester and tartaric acid monoethyl the content is less than 0.01percent, and 0.02percent.Example-32; To a medium pressure chromatographic column, slurry of (S)-aminopropyl alcohol(at)silica 1 (0.512 mol percent) in hexane and isopropanol (8:2) was packed in a 260.x.16 mm glass column using medium-pressure (0.5 kp/cm
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