L-dopa methyl ester hydrochloride synthesis and purification method

The invention discloses a preparing method of bendopa methyl ester hydrochlorate, which is characterized by the following: adopting bendopa and carbinol as raw material through multi-distilling dehydrating method; modifying sulfone chloride method and hydrochloride method; removing water and esterif...

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Bibliographic Details
Main Author WEIZHE JIANG
Format Patent
LanguageEnglish
Published 25.04.2007
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:The invention discloses a preparing method of bendopa methyl ester hydrochlorate, which is characterized by the following: adopting bendopa and carbinol as raw material through multi-distilling dehydrating method; modifying sulfone chloride method and hydrochloride method; removing water and esterifying water; accelerating the esterifying reaction to terminal; purifying bendopa methyl ester hydrochlorate through ligarine, skellysolve B, cyclohexane, cyclopentene and heptane.
Bibliography:Application Number: CN20061125071