Patent ID: 7268252

Claim:
A binaphthol derivative, represented by the following chemical formula I: wherein R1 and R2 each is Hydrogen, a straight or branched alkyl substitutable with halogen or OH, a cyclic alkyl substitutable with halogen or OH, alkenyl, alkynyl, or an aryl substitutable with halogen or OH; and R3 is NHCXR4 or NHCHNH 2 + , wherein X is an oxygen or sulfur atom, and R4 is a straight or branched alkyl substitutable with halogen, NR5R6, or OR7, wherein R5 to R7 each is hydrogen, a straight or branched alkyl substitutable with halogen, or an aryl and if R3 is NHCHNH 2 + , the counter ion is halogen ion or R13COO − wherein R13 is alkyl or aryl.