[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([CH2:9][SH:10])=[CH:5][CH:4]=1.[OH-].[Na+].[C:13]([OH:18])(=[O:17])[C:14]([CH3:16])=[CH2:15]>[Cl-].C([P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)C1C=CC=CC=1>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([CH2:9][S:10][CH2:15][CH:14]([CH3:16])[C:13]([OH:18])=[O:17])=[CH:5][CH:4]=1To a 25 mL three-necked reaction flask, 4.2 mL (0.03 mole) of p-methoxy-α-toluenethiol, 0.58 g (1.5×10-3 mole) of benzyltriphenyl phosphonium chloride and 15 mL (0.03 mole) of 2N NaOH solution were added. The resulting solution was heated to 82° C. with agitation for one hour. Thereafter, 2.56 mL (0.03 mole) of methacrylic acid were added dropwise to the preheated mixture over a 30 minute period, and the reaction mixture was heated to 125° C. and maintained under reflux for 18 hours.
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