Title:
PRODUCTION METHOD OF 2-METHYL-5,6-DIHYDRO-2H-PYRAN
Document Type and Number:
WIPO Patent Application WO/2023/127533
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a production method of 2-methyl-5,6-dihydro-2H-pyran, by which a high yield can be achieved even in the case of reacting at a relatively low temperature and in which the adhesion of precipitates to a reactor, piping and measurement instruments is suppressed. The production method of 2-methyl-5,6-dihydro-2H-pyran of the present invention comprises reacting 1,3-pentadiene and a formaldehyde-generating substance in a solvent in the presence of a Lewis acid catalyst at a temperature within a preset range in a single reactor to thereby synthesize 2-methyl-5,6-dihydro-2H-pyran.
Inventors:
KAWAKAMI OSAMU (JP)
ITO SATOSHI (JP)
ITO SATOSHI (JP)
Application Number:
PCT/JP2022/046269
Publication Date:
July 06, 2023
Filing Date:
December 15, 2022
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
C07D309/18; C07C29/132; C07C33/025; C07B61/00
Foreign References:
| JPS471469B1 | 1972-11-14 | |||
| JPS55102531A | 1980-08-05 | |||
| CN101143860A | 2008-03-19 | |||
| JPH1077278A | 1998-03-24 |
Other References:
LEO A. PAQUETTE: "Encyclopedia of reagents for organic synthesis; Vol. 7 : Sod - Trim", 1 January 2009, WILEY , Chichester , ISBN: 978-0-470-84289-8, article OLLEVIER THIERRY, NADEAU ETIENNE, DESYROY VALERIE: "Bismuth(III) Trifluoromethanesulfonate", pages: 1 - 6, XP093073814, DOI: 10.1002/047084289X.rn00959
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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