Patent ID: 8748664

Claim:
A method for producing the diamine compound represented by formula (1) below, the method comprising steps of: obtaining a compound (B) represented by formula (4) below by a condensation reaction between 2,7-dihydroxy-9-fluorenone represented by formula (2) and a compound (A) represented by formula (3), obtaining a compound (C) represented by formula (5) below by reducing a ketone group at the 9-position in a fluorene skeleton of the compound (B) to a state where a hydroxy group is bonded to a carbon atom at the 9-position, and thereafter acetylating the hydroxy group, obtaining a diamine compound represented by the formula (1) by reducing the carbon atom at the 9-position, to which the acetoxy group is bonded, in the fluorene skeleton of the compound (C), and reducing nitro groups included in the compound (A)-derived substituents that are bonded to carbon atoms at the 2-position and the 7-position in the skeleton, wherein X in formula (3) denotes a halogen group, and A in formulae (1) and from (3) to (5) denotes: a divalent aliphatic group R 1 , which may have a substituent and has a carbon number from 1 to 10; a divalent aromatic group Ar 1 , which has from 1 to 4 ring structures and may have a substituent; a group composed of divalent aromatic groups Ar 2 and Ar 3 , each of which has from 1 to 4 ring structures and may have a substituent, the group being represented by a formula [—Ar 2 —Ar 3 —] (where Ar 2 and Ar 3 may be same as or different from each other); a group composed of divalent aromatic groups Ar 4 and Ar 5 , each of which has from 1 to 4 ring structures and may have a substituent, and Z, which is an ether group (—O—), a thioether group (—S—), or a sulfone group (—SO 2 —), the group being represented by a formula [—Ar 4 —Z—Ar 5 -] (where Ar 4 and Ar 5 may be same as or different from each other); a group composed of a divalent aromatic group Ar 6 , which has from 1 to 4 ring structures and may have a substituent, and a divalent aliphatic group R 2 , which may have a substituent and has a carbon number from 1 to 10, the group being represented by a formula [—Ar 6 —R 2 —]; or a group composed of divalent aromatic groups Ar 7 and Ar 8 , each of which has from 1 to 4 ring structures and may have a substituent, and a divalent aliphatic group R 3 , which may have a substituent and has a carbon number from 1 to 10, the group being represented by a formula [—Ar 7 —R 3 —Ar 8 —] (where Ar 7 and Ar 8 may be same as or different from each other), wherein the substituent is at least one group selected from a methyl group, an ethyl group, a propyl group, a butyl group, a trifluoromethyl group, a phenyl group, a phenoxy group, a phenylthio group, and a benzenesulfonyl group.