6-(FLUOROALKYL)-3,4-DIHYDRO-2H-PYRAN-5-CARBOXYLIC ACID ESTER DERIVATIVE, METHOD FOR PRODUCING DERIVATIVE, METHOD FOR PRODUCING 2-(FLUOROALKYL)NICOTINIC ACID ESTER DERIVATIVE, AND METHOD FOR PRODUCING 2-(FLUOROALKYL)NICOTINIC ACID DERIVATIVE

WIPO Patent Application WO/2021/193786

A1

The present invention provides: a 6-(fluoroalkyl)-3,4-dihydro-2H-pyran-5-carboxylic acid ester derivative represented by a specific formula (3); a method for producing the same; a method for producing a 2-(fluoroalkyl) nicotinic acid derivative which is represented by a specific formula (5), and is characterized in that the 6-(fluoroalkyl)-3,4-dihydro-2H-pyran-5-carboxylic acid ester derivative is reacted with an ammonium compound or ammonia, or is reacted with a base, an ammonium compound or ammonia, or after treating with acid or Lewis acid, is reacted with an ammonium compound or ammonia; and a method for producing an intermediate of the 2-(fluoroalkyl)nicotinic acid derivative.

MORITA MOTOAKI (JP)
HIROKI HIDEKATSU (JP)
OHNO RYUTA (JP)
OOHASHI TAKUMI (JP)
SUNAGAWA SHO (JP)

PCT/JP2021/012441

September 30, 2021

March 24, 2021

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HOKKO CHEM IND CO (JP)

C07D309/30; C07D213/80; C07D213/803

WO2019224174A1

2019-11-28

EP0230771A2	1987-08-05
JPS62265280A	1987-11-18
JPS5037782A	1975-04-08
JPH09104675A	1997-04-22
JP2017522290A	2017-08-10

SCHMIDT, RICHARD R. ET AL.: "HETERO-DIELS-ALDER REACTIONS OF ALPHA-METHOXYMETHYLENE SUBSTITUTED 1,3-DICARBONYL COMPOUNDS WITH ENOL AND ENEDIOL ETHER", TETRAHEDRON LETTERS, vol. 23, no. 17, 1982, pages 1789 - 1792, XP055862065, ISSN: 0040-4039

KOH-EI PATENT FIRM, P.C. (JP)

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