PROCESS FOR PRODUCING CYCLIC COMPOUND

WIPO Patent Application WO/2001/060768

A1

A process suitable for safely mass-producing, through a short step, cyclic compounds useful in medicines, agricultural chemicals, foods, cosmetics, and chemical products or as intermediates therefor. The process, which is for producing a compound represented by the formula (I) or a salt thereof: {wherein Z represents an electron-attracting group; W represents optionally substituted ethylene or optionally substituted vinylene; R?3¿ represents hydrogen or an optionally substituted hydrocarbon group; and X represents a divalent group [provided that when W represents optionally substituted vinylene, then -X-CH¿2?-Z is not -X?1¿-X?2¿-CH¿2?-Z (wherein X?1¿ represents sulfur or optionally substituted nitrogen and X?2¿ represents optionally substituted ethylene)]}, is characterized by subjecting a compound represented by the formula (II) or a salt thereof: (wherein the symbols have the same meanings as the above) to a ring closure reaction in a solvent containing a carbonic diester.

IKEMOTO TOMOMI (JP)
ITO TATSUYA (JP)
TOMIMATSU KIMINORI (JP)

PCT/JP2001/001190

August 23, 2001

February 20, 2001

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TAKEDA CHEMICAL INDUSTRIES LTD (JP)
IKEMOTO TOMOMI (JP)
ITO TATSUYA (JP)
TOMIMATSU KIMINORI (JP)

C07D225/06; C07D313/08; C07D313/20; (IPC1-7): C07B37/10; C07D225/06; C07D313/08; C07D313/20

ACHESON R.M. AND PAGLIETTI G.: "Addition reactions of heterocyclic compounds. Part 76. Aminopropylbenzenecarboxylic esters and tetrahydroazocines from tetrahydropyridines and acetylenic esters", J. CHEM. RES., SYNOPSES, no. 10, 1981, pages 306, XP002938966

Takahashi, Shuichi c/o Osaka Plant of Takeda Chemical Industries (Ltd. 17-85 Jusohonmachi 2-chome Yodogawa-ku Osaka-shi, Osaka, JP)

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