Thiopyran derivatives

An intermediate represented by the following formula (XVIII),

• wherein A is the group —CH═CH—;
• L is an alkylene group which may be substituted, an alkenylene group which may be substituted, or an alkynylene group which may be substituted, wherein when L is a group which is substituted, it is substituted by one or more halogen atoms;
• W represents a leaving group selected from the group consisting of a halogen atom, an alkyl sulfonyloxy group, and an aryl sulfonyloxy group, and Z represents the group;
• (wherein R1 is an alkyl group which may be substituted, an aromatic carbocyclic group which may be substituted, or an aralkyl group which may be substituted, wherein when R1 is a group which is substituted, it is substituted by one or more halogen atoms, alkyl groups, or alkoxy groups, X1, X2, and X3 individually represent an oxygen atom or a sulfur atom, and G represents an ethylene group or a trimethylene group, of which one or more hydrogen atoms of the ethylene group or trimethylene group may be replaced by a halogen atom, alkyl group, aromatic carbocyclic group, aralkyl group, or alkylidene group).