反应详情

The known compound, 2-benzyl-benzo[b]thiophene (CA reg. no. 3407-15-6) was acylated with one equilvalent of anisoyl chloride using one equivalent of a tin (IV) chloride promoter in carbon disulfide solvent to afford (2-benzyl-benzo[b]thiophen-3-yl)-(4-methoxy-phenyl)-methanone (85% yield). This compound was demethylated using six equivalents of pyridinium hydrocholide at 228° C. to afford (2-benzyl-benzo[b]thiophen-3-yl)-(4-hydroxy-phenyl)-methanone (90% yield). This compound was brominated according to the procedure in Example 4 to afford the tide compound as a white solid (95% yield): mp 155.5-156.5; MS m/e 500 (M)+;