204  US 8,574,814 B2  203  (P-16)  ::(LI)  OH  lQ  #  x/y/z  ~  81/14/15  Mw  ~  4400, PD!~ 1.12  OH  (P-11)  o )"o~  ~o  x/y  ~  80/20  Mw  ~  4700, PD!~ 1.12  OH  (P-12)  0  Ou  I ✓,;::;  MeO  x/y  ~  84/16  Mw  ~  4400, PD!~ 1.13  OH  (P-13)  x/y/z  ~  76/19/5  Mw  ~  12400, PD!~ 1.08  VP-2500 (10.0 g) was used as a polyhydroxystyrene com› pound, and Cl-1 was used as a chloroether compound, the  substitution reaction was carried out so that the amount sub- stituted with the compound Cl-1 was 17 mo! % in the same  manner as in Synthesis Example 1. Distilled water was added  thereto to stop the reaction. THE was removed by distillation  under reduced pressure, and the reactant was dissolved in  ethyl acetate. The obtained organic layer was washed 5 times  with distilled water, followed by concentration and drying.  The obtained polymer was dissolved in 40 g ofN,N-dim› ethylformamide (DMF), and 6.58 g of pyridine, 0.92 g of  2-sulfobenzoic anhydride as a sulfonating agent (hereinbe› low, abbreviated to SN-1), and 122 mg ofN,N-dimethylami- nopyridine were added thereto, followed by stirring at room  temperature for 5 hours. The reaction solution was transferred  to a separatory funnel containing 100 mL of ethyl acetate, the  Synthesis of Compound (P-17)  Synthesis Example 17  )"o~  0  OH  1G  (P-14)  (P-15)  (P-14)  x/y/z  ~  83/14/3  Mw  ~  4600, PD!~ 1.11  (P-15)  x/y/z  ~  76/21/3  Mw  ~  5200, PD!~ 1.12  -continued  -continued 