Title:
METHOD FOR PRODUCING BINAPHTHYL CARBOXYLIC ACID
Document Type and Number:
WIPO Patent Application WO/2020/226114
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a novel method for producing 2, 2'-bis(carboxymethoxy)-1, 1'-binaphthyl that is suitable as a resin starting material having excellent optical characteristics. The present invention provides, as a solution, a method for producing 2, 2'-bis(carboxymethoxy)-1, 1'-binaphthyl, which comprises a step (1) wherein crystallization is carried out, while setting the water content in a solution that contains 2, 2'-bis(carboxymethoxy)-1, 1'-binaphthyl and one or more substances selected from among chain aliphatic ketones having 5-8 carbon atoms to a value within the range of from 0.01% by weight to 2.0% by weight (inclusive).
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Inventors:
SAKUMA DAICHI (JP)
SUTO TAKERU (JP)
TSUCHIYA SHINICHI (JP)
SUTO TAKERU (JP)
TSUCHIYA SHINICHI (JP)
Application Number:
PCT/JP2020/018213
Publication Date:
November 12, 2020
Filing Date:
April 30, 2020
Export Citation:
Assignee:
HONSHU CHEMICAL IND (JP)
International Classes:
C07C51/43; C07C59/66
Domestic Patent References:
WO2001051095A2 | 2001-07-19 |
Foreign References:
JP2018002895A | 2018-01-11 | |||
JP2001072872A | 2001-03-21 | |||
JP2001072872A | 2001-03-21 | |||
JP2018002893A | 2018-01-11 | |||
JP2018002894A | 2018-01-11 | |||
JP2018002895A | 2018-01-11 | |||
JP2008024650A | 2008-02-07 |
Other References:
GHOSH,K. ET AL.: "rac)-1,1'-Binaphthyl-Based Simple Receptors Designed for Fluorometric Discrimination of Maleic and Fumaric Acids", J. PHYS. CHEM. B, vol. 115, no. 26, 2011, pages 8597 - 8608, XP055756971, DOI: 10.1021/jp202304k
Attorney, Agent or Firm:
YAMADA, Yasuyuki et al. (JP)
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