Patent ID: 8273919

Claim:
A synthesis method comprising reacting an acid fluoride represented by Formula (2) with a compound having a diamino group represented by Formula (3) in pyridine solvent, thereby producing the compound represented by Formula (1): wherein k is an integer from 1 to 5, and n is an integer of 1 or more; wherein Y represents an oxygen atom (O), a sulfur atom (S), a CO group, a SO group, or a SO 2 group; and m is an integer from 1 to 10; and wherein two substituents on each phenyl group may be in any of ortho-, meta-, and para-positions; and wherein Y represents an oxygen atom (O), a sulfur atom (S), a CO group, a SO group, or a SO 2 group; k is an integer from 1 to 5; m is an integer from 1 to 10; and n is an integer of 1 or more; and wherein two substituents on each phenyl group may be in any of ortho-, meta-, and para-positions.