A Pd-mediated intramolecular aryl–aryl coupling reaction of phenyl benzoate derivatives were examined to form benzo[c]chromen-6-ones, and then enantioselective lactone-opening reaction with a borane–oxazaborolidine combination was carried out. The resulting biphenyl was transformed into a key intermediate for the stegane related compounds. The absolute configuration of the biphenyl is also discussed
研究了Pd介导的
苯甲酸苯酯衍
生物的分子内芳基-芳基偶联反应形成苯并[ c ] chromen-6-ones,然后与
硼烷-
恶唑硼烷结合进行对映选择性内酯开放反应。将得到的
联苯转化为硬脂烷相关化合物的关键中间体。还讨论了
联苯的绝对构型。