[CH2:1]([S:9][CH2:10][CH2:11][OH:12])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH3:8].N1C=CC=CC=1.[C:19](Cl)(=[O:23])[C:20]([CH3:22])=[CH2:21]>C1C=CC=CC=1>[C:19]([O:12][CH2:11][CH2:10][S:9][CH2:1][CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH3:8])(=[O:23])[C:20]([CH3:22])=[CH2:21]2(n-Octylthio)ethanol (13.10 grams, 0.0688 mole) and anhydrous pyridine (65.5 grams) were charged to a three-necked flask fitted with a condenser protected with a drying tube, dropping funnel, thermometer and magnetic stirrer. The solution was cooled to 5° C., and methacrylyl chloride (7.20 grams, 0.0688 mole) was then added dropwise over a 26-minute period. The reaction solution was maintained at 9°-11° C. throughout the addition period, and then at 25° C. for another three hours with stirring. The reaction mixture was then diluted with 150 ml of benzene, and the pyridine hydrochloride present was removed by filtration. The filtrate was washed twice with dilute hydrochloric acid, then with water until neutral and finally dried over anhydrous sodium sulfate. The benzene solvent was stripped off leaving 13.1 grams of crude product which was purified by vacuum distillation to yield 11.8 grams of the desired ester with a boiling point of 111°-124° C./0.07 mm in a yield of 66%.
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