Title:
PREPARATION METHOD FOR OCTYL (R)-2-(4-CHLORO-2-METHYLPHENOXY) PROPIONATE ROOT RETARDER
Document Type and Number:
WIPO Patent Application WO/2019/029491
Kind Code:
A1
Abstract:
Disclosed in the present invention is a preparation method for octyl (R)-2-(4-chloro-2-methylphenoxy) propionate which can be used as a root retarder, comprising: using L-ethyl lactate as a raw material to perform sulfonation with p-toluenesulfonyl chloride to obtain a corresponding sulfonyl ester compound; performing etherification of the sulfonyl ester compound and 4-chloro-o-cresol to obtain a corresponding aromatic ether ester compound; and finally subjecting the ether ester compound to ester exchange with n-octanol to obtain octyl (R)-2-(4-chloro-2-methylphenoxy) propionate. The octyl (R)-2-(4-chloro-2-methylphenoxy) propionate obtained by the method provided in the present invention has a high optical content, the optical loss of the raw materials is relatively low, and the yield is relatively high. The present invention establishes a reaction system in which the preparation process is simple, the reaction conditions are mild and the cost is low, thereby solving the problem, to some extent, of reliance on the importation and scarce sources of the compound.
Inventors:
ZHU YUEQUAN (CN)
GONG XINGYU (CN)
LU JIANG (CN)
GONG XINGYU (CN)
LU JIANG (CN)
Application Number:
PCT/CN2018/099020
Publication Date:
February 14, 2019
Filing Date:
August 06, 2018
Export Citation:
Assignee:
KESHUN WATERPROOF TECH CO LTD (CN)
International Classes:
C07C69/712; C07C67/03
Foreign References:
| GB1586462A | 1981-03-18 | |||
| JPS63218644A | 1988-09-12 | |||
| CN107473962A | 2017-12-15 |
Attorney, Agent or Firm:
GUANGZHOU RUNHE INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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