[SH:1][C:2]1[CH:3]=[C:4]([O:8][CH3:9])[CH:5]=[CH:6][CH:7]=1.[OH-].[K+].[CH:12]1[C:17]([C:18]([CH2:20]Br)=[O:19])=[CH:16][CH:15]=[C:14]([Br:22])[CH:13]=1.CCOC(C)=O>C(O)C.O>[Br:22][C:14]1[CH:15]=[CH:16][C:17]([C:18](=[O:19])[CH2:20][S:1][C:2]2[CH:7]=[CH:6][CH:5]=[C:4]([O:8][CH3:9])[CH:3]=2)=[CH:12][CH:13]=1
10.09 g (70.5 mmol) 3-mercaptoanisole were added to a freshly prepared solution of 4.6 g (70.5 mmol) KOH in 75 ml ethanol and 30 ml water. Over a period of 30 min, 20.0 g (70.5 mmol) 2,4-dibromoacetophenone in 150 EtOAc were added at 0° C. and the solution was stirred at RT over night. The suspension was concentrated and dissolved in EtOAc and water. The inorganic phase was extracted with EtOAC, the combined organic phases were washed with water and brine and dried over Na2SO4. Evaporation yielded 25.1 g (quant) 1-(4-Bromo-phenyl)-2-(3-methoxy-phenylsulfanyl)-ethanone as white crystalline, MS: 336(M, 1Br). (In analogy to Jones, Charles D.; Jevnikar, Mary G.; Pike, Andrew J.; Peters, Mary K.; Black, Larry J.; Thompson, Allen R.; Falcone, Julie F.; Clemens, James A. Antiestrogens. 2. Structure-activity studies in a series of 3-aroyl-2-arylbenzo[b]thiophene derivatives leading to [6-hydroxy-2-(4-hydroxyphenyl)benzo[b]thien-3-yl]-[4-[2-(1-piperidinyl)ethoxy]phenyl]methanone hydrochloride (LY 156758), a remarkably effective estrogen antagonist with only minimal intrinsic estrogenicity. J. Med. Chem. (1984), 27(8), 1057-66.)
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