Patent ID: 8754221

Claim:
A method for preparing a non-racemic naphthalene compound represented by general formula [A]: which comprises the following steps of (a) to (c): (a) reacting a compound represented by general formula [Ib]: wherein Z represents a protecting group for hydroxyl group, and * represents an asymmetric carbon atom, with a compound represented by general formula [III]: wherein Ra and Rb are the same or different and each represents a hydrogen atom or a protecting group for carboxyl group, and X represents a halogen atom, to obtain a non-racemic naphthalene compound represented by general formula [IV]: wherein the symbols have the same meaning as defined above; (b) reducing the compound [IV] to obtain an optically active 2,3-bishydroxymethylnaphthalene compound represented by general formula [V]: wherein the symbols have the same meaning as defined above; and (c) removing the protecting group Z for hydroxyl group from the compound [V].