Process for producing cyclic compound

C - Chemistry – Metallurgy – 07 – B

Patent

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C07B 37/10 (2006.01) C07D 225/06 (2006.01) C07D 313/08 (2006.01) C07D 313/20 (2006.01)

Patent

CA 2400979

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; R3 represents hydrogen or an optionally substituted hydrocarbon group; and X represents a divalent group [provided that when W represents optionally substituted vinylene, then -X-CH2-Z is not -X1-X2-CH2-Z (wherein X1 represents sulfur or optionally substituted nitrogen and X2 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.

L'invention porte sur un procédé sûr de production en masse selon un cycle court de composés cycliques à usage médical, agricole, chimique, alimentaire et cosmétique, et sur des produits chimiques leurs servant d'intermédiaires. Lesdits composés (ou leurs sels) sont représentés par la formule (I) {dans laquelle Z représente un groupe attracteur d'électrons; W représente éthylène ou vinylène facultativement substituées; R?3¿ représente H ou un groupe hydrocarboné facultativement substitué; et X représente un groupe divalent [pour autant que W représente vinylène facultativement substitué auquel cas, -X-CH¿2? n'est pas X?1¿-X?2¿-CH¿2?-Z (où X?1¿ représente S ou N facultativement substitué, et X?2¿ représente éthylène facultativement substitué)]}, consistant à soumettre un composé représenté par la formule (II) (dans laquelle les symboles ont le même sens que ci-dessus) à une réaction de fermeture de cycle dans un solvant contenant un diester carbonique.

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