Cyclofunctionalization and Free-Radical-Based Hydrogen-Transfer Reactions. An Iterative Reaction Sequence Applied to the Synthesis of the C<sub>7</sub>−C<sub>16</sub> Subunit of Zincophorin
作者:Yvan Guindon、Lorraine Murtagh、Valérie Caron、Serge R. Landry、Grace Jung、Mohammed Bencheqroun、Anne-Marie Faucher、Brigitte Guérin
DOI:10.1021/jo010310f
日期:2001.8.1
ion/hydrogen-transfer reaction sequence for the elaboration of propionate motifs. Proceeding with excellent yield and diastereoselectivity, the synthetic sequence proposed gives access to the anti-anti dipropionate motif when the reduction step is performed under the control of the exocyclic effect. The tandem sequence is applied successfully to the synthesis of the C(7)-C(16) subunit of zincophorin
本文考虑的策略的特征是用于精制丙酸酯基序的碘代环官能化/氢转移反应序列。以优异的收率和非对映选择性进行,当在外环效应的控制下进行还原步骤时,所提出的合成序列可进入抗二丙酸酯抗性基序。串联序列成功地应用于锌卟啉的C(7)-C(16)亚基的合成,并且该过程的迭代给出了所需的抗-抗-抗-丙酸酯立体五单元。修饰反应顺序-包括苯基硒杂环官能化,碳酸盐水解和螯合控制的自由基还原反应-导致形成具有非对映异构控制性的反己二丙酸酯基序。