Appeal No. 2007-0218
Application No. 10/730,143
wherein R1 and R1' each independently represent an alkyl group having 3 to
20 carbon atoms, in which a carbon atom bonding to the benzene ring is
secondary or tertiary; R2 and R2' each represent a methyl group; L represents
an -S- group or a -CHR3- group, in which R3 represents a hydrogen atom or
an alkyl group having 1 to 20 carbon atoms; and X1 and X1' each
independently represent a hydrogen atom or a group capable of being
substituted on the benzene ring; and
the reducing agent includes a second compound selected from formula
(R-2) or from formula (R-3)
Formula (R-2)
wherein R11 and R11' each independently represent an alkyl group having 3 to
20 carbon atoms, in which a carbon atom bonding to the benzene ring is
secondary or tertiary; R12 and R12' each independently represent an alkyl
group having 2 to 20 carbon atoms; L represents an -S- group or a -CHR13-
group, in which R13 represents a hydrogen atom or an alkyl group having 1
to 20 carbon atoms; and X11 and X11' each independently represent a
hydrogen atom or a group capable of being substituted on the benzene ring;
Formula (R-3)
3
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