Brønsted Acid‐Catalyzed Intramolecular 7‐<i>endo</i> Hydroarylation Reaction of 1,5‐Diaryl‐1‐pentynes
作者:Kosho Makino、Shunsuke Sueki、Masahiro Anada
DOI:10.1002/adsc.202300220
日期:2023.5.12
A Brønsted acid-catalyzed, transition metal-free intramolecular 7-endo hydroarylation reaction of 1,5-diaryl-1-pentynes has been developed. The use of 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) as a solvent was found to be critical for this process. Using the present methodology, we have accomplished the synthesis of KGP-18, an analogue of the anticancer natural product combretastatin A4.
已开发出 1,5-二芳基-1-戊炔的Brønsted 酸催化、无过渡金属的分子内 7-内加氢芳基化反应。发现使用 1,1,1,3,3,3-六氟-2-丙醇 (HFIP) 作为溶剂对该过程至关重要。使用目前的方法,我们已经完成了 KGP-18 的合成,KGP-18 是抗癌天然产物 combretastatin A4 的类似物。