Process for producing cyclic compound

Details Process for producing cyclic compound Process for producing cyclic compound

2005-03-08

2005-03-08

Zucker, Paul A. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

C540S593000, C549S355000

Reexamination Certificate

active

06864367

ABSTRACT:
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:{wherein Z represents an electron-attracting group; W represents optionally substituted ethylene or optionally substituted vinylene; R3represents 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 X1represents sulfur or optionally substituted nitrogen and X2represents optionally substituted ethylene)]} or a salt thereof, 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.

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