* C3'C2 (VII) (Scheme5) a compound represented by the formula (IIh) (hereinafter simply referred to as Compound (IIh)), which correspond to the compounds (II) wherein G represents a halogen atom such as chlorine atom, bromine atom or iodine atom, can be prepared by halogenating a compound represented by the formula (VII) [this compound is simply referred to as"Compound (VII)], which is commerci