Fujisawa Pharmaceutical Company, Ltd.

Norihiro Hashimoto

Hiroshi Hatanaka

Michio Yamashita

Keiji Honda

Tomoji Higaki

Takashi Yoshiyasu

Koji Mukai

Yutaka Nishihara

A method for separating a lactone-containing high-molecular weight compound comprising subjecting a mixture of a lactone-containing high-molecular weight compound having, as its side-chain, at least one of a lower alkenyl group and a lower alkoxy group and its analogous compound(s) to either one or both steps in any order of a step (A) for adsorbing the mixture to a nonionic adsorption resin and eluting with an aqueous solvent containing silver ions, and a step (B) for adsorbing the mixture to a basic active alumina and eluting with an organic solvent to separate each of the compounds.

Method for separating lactone-containing high-molecular weight compounds

The present invention relates to a method for separating a lactone-containing high-molecular weight compound having an alkyl group as its side chain from a lactone-containing high-molecular weight compound having an alkenyl group as its side chain by using a sulfonic acid group-containing cation exchange resin pretreated with silver ions.

Method for separating analogous organic compounds

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Osaka, Japan

Norihiro Hashimoto