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A method for synthesizing L - menthol (by machine translation)
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Paragraph 0135; 0139, (2017/09/02)
The invention relates to a method for synthesizing L - menthol, comprises the following sequentially the steps of: (1) addition reaction; (2) the isomerization rearrangement reaction; (3) asymmetric hydrogenation reaction; (4) hydrolysis reaction; (5) the resulting compound IV L - menthol through reduced pressure distillation to remove the solvent to obtain the L - menthol crude, through recrystallization, L - menthol to obtain the finished product. This invention has overcome the existing L - menthol preparation method is complex, the need for chiral separation, the reaction yield is low, the great shortcoming of the damage to the environment, has a simple preparation method, without the need for chiral separation step, with high reaction yield, friendly advantage of the environment. (by machine translation)
