An efficient total synthesis of 9-methoxycarbazole-3-carbaldehyde based on a novel methodology for the preparation of methoxyindoles
作者:N. Selvakumar、Manoj Kumar Khera、B.Yadi Reddy、D. Srinivas、A.Malar Azhagan、Javed Iqbal
DOI:10.1016/s0040-4039(03)01745-3
日期:2003.9
A direct synthesis of naturally occurring 9-methoxycarbazole-3-carbaldehyde 1, based on our methodology for the synthesis of 1-methoxyindoles, is reported. A novel benzannulation strategy was employed using ring closing metathesis as the key step in this total synthesis. The synthesis of the natural product 1 has been achieved in seven steps in 14% overall yield from commercial materials and in only
据报道,基于我们合成1-甲氧基吲哚的方法,可以直接合成天然存在的9-甲氧基咔唑-3-甲醛1。采用一种新的苯环化策略,该方法使用闭环复分解作为该总合成中的关键步骤。天然产物1的合成已经以七个步骤完成,从商业原料中获得14%的总收率,并且仅四个步骤就由使用新方法获得的甲氧基吲哚化合物完成了合成。