Silver-promoted Friedel–Crafts reaction: concise total synthesis of (−)-ardeemin, (−)-acetylardeemin and (−)-formylardeemin
作者:Y. Wang、C. Kong、Y. Du、H. Song、D. Zhang、Y. Qin
DOI:10.1039/c2ob00014h
日期:——
Total syntheses of multidrug resistant inhibitors (−)-acetylardeemin 2a, (−)-ardeemin 2b, and (−)-formylardeemin 3 have been achieved within 10 steps starting from bromopyrroloinoline 13. The key step involves direct alkylation of 13 with prenyl tributylstannane 11 to yield 12via a silver-promoted asymmetric Friedel–Crafts reaction. Highly efficient installation of the isoprenyl group allowed excellent
从溴代吡咯啉啉13开始,已在10步之内完成了多药耐药抑制剂(-)-乙酰ardeemin 2a,(-)-ardeemin 2b和(-)-formylardeemin 3的总合成。的关键步骤涉及的直接烷基化13与异戊烯基三丁基锡烷11,得到12经由银促进的非对称的Friedel-Crafts反应。异戊二烯基的高效安装可实现出色的总收率。此外,不对称Friedel-Crafts反应的底物范围从13扩大到包括各种芳烃14提供了类似天然产物的库类似物15。