[CH3:1][O:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9](=[O:16])[CH2:10][C:11]([O:13][CH2:14][CH3:15])=[O:12].S(Cl)([Cl:20])(=O)=O>C(OCC)C>[Cl:20][CH:10]([C:9]([C:4]1[CH:5]=[CH:6][CH:7]=[CH:8][C:3]=1[O:2][CH3:1])=[O:16])[C:11]([O:13][CH2:14][CH3:15])=[O:12]Using ethyl 3-(2-methoxyphenyl)-3-oxopropanoate (1.7 g, 7.4 mmol), sulfuryl chloride (1.2 g, 8.9 mmol) and diethyl ether (100 mL) as starting materials and in the same manner as in Example 20(i), the title compound (1.8 g, 97%) was obtained as colorless oil.
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