The acid XI, obtained by reaction of (2-iodo-5-methoxyphenyl)acetic acid with 4-(methylsulfonyl)thiophenol (VIII) in dimethylformamide in the presence of potassium carbonate and copper, was transformed via intermediates XIIa-XIVa to compound XVa. Demethylation with boron tribromide afforded compound III, the potential metabolite of oxyprothepin (II). Its oxidation with hydrogen peroxide in acetic acid gave the sulfoxide XVII, which is a further potential metabolite. A reaction of 2-iodo-4-methoxybenzoic acid with VIII and potassium carbonate in dimethylformamide in the presence of copper afforded the acid XIX whose ester XXI was reduced with diborane to the alcohol XXII; hydrogenolysis to compound XXIII was also observed. The
alcohol XXII was processed via compounds XXIV and XXV to the acid XXVI which was cyclized in a low yield to the ketone XIIb. A further processing via the intermediates XIIIb and XIVb led to compound XVb. Demethylation gave compound IV, another potential metabolite.
通过在二甲基甲酰胺中在钾碳酸盐和铜的存在下,将(2-碘-5-甲氧基苯基)乙酸与4-(甲磺基)噻吩酚反应得到的酸XI,经过中间体XIIa-XIVa转化为化合物XVa。用三溴化硼去甲基化得到化合物III,这是氧丙替平的潜在代谢产物。在乙酸中用过氧化氢氧化得到亚砜XVII,这是另一个潜在的代谢产物。将2-碘-4-甲氧基苯甲酸与VIII和钾碳酸盐在二甲基甲酰胺中在铜的存在下反应得到酸XIX,其酯XXI被二硼烷还原为醇XXII;醇XXII经氢解成化合物XXIII。醇XXII经过化合物XXIV和XXV转化为酸XXVI,低收率下环化为酮XIIb。通过中间体XIIIb和XIVb进一步处理得到化合物XVb。去甲基化得到化合物IV,另一个潜在的代谢产物。