Title:
METHOD FOR PRODUCING NAPHTHOPYRAN COMPOUND
Document Type and Number:
WIPO Patent Application WO/2007/037470
Kind Code:
A1
Abstract:
Disclosed is a method for producing a naphthopyran compound which is characterized in that a naphthol derivative and a propargyl alcohol derivative are reacted with each other in the presence of silica which is used as an acid catalyst. By such a method, a naphthopyran compound such as 3,3-di(3-fluoro-4-methoxyphenyl)-6-morpholino-3Hnaphtho[2,1-b]pyran, which is useful as a photochromic compound, can be produced with high yield.
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| WO/1996/004322 | GAS PHASE PRODUCTION OF POLYDIENES |
| WO/2003/050106 | COUMARIN COMPOUND |
Inventors:
TAKENAKA JUNJI (JP)
KUWASHIMA NOBUMASA (JP)
KUWASHIMA NOBUMASA (JP)
Application Number:
PCT/JP2006/319655
Publication Date:
April 05, 2007
Filing Date:
September 26, 2006
Export Citation:
Assignee:
TOKUYAMA CORP (JP)
TAKENAKA JUNJI (JP)
KUWASHIMA NOBUMASA (JP)
TAKENAKA JUNJI (JP)
KUWASHIMA NOBUMASA (JP)
International Classes:
C07D311/92
Foreign References:
| JP2002525365A | 2002-08-13 | |||
| JP2001518893A | 2001-10-16 |
Other References:
RAMAZANI A. ET AL.: "Silica gel catalyzed conversion of dialkyl 2-(2-hydroxy-1-naphthyl)-3-(1,1,1-triphenyl-lambda5-phosphanylidene)succinates to alkyl -oxo-3H-benzo[f]chromene-1-carboxylates in solvent-free conditions", PHOSPHORUS, SULFUR AND SILICON AND THE RELATED ELEMENTS, vol. 178, no. 6, 2003, pages 1329 - 1332, XP003011077
KANEKO T. ET AL.: "Photochromic radical compounds based on a naphthopyran system", ORGANIC LETTERS, vol. 5, no. 12, 2003, pages 2127 - 2129, XP003011078
KANEKO T. ET AL.: "Photochromic radical compounds based on a naphthopyran system", ORGANIC LETTERS, vol. 5, no. 12, 2003, pages 2127 - 2129, XP003011078
Attorney, Agent or Firm:
ONO, Hisazumi et al. (1-21 Nishi-shimbashi 1-chom, Minato-ku Tokyo, JP)
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