Formation of 2-halomethylene-4-cyclopentene-1,3-diones and/or 2-halo-1,4-benzoquinones via ring-expansion of 4-ethynyl-4-hydroxy-2,3-substituted-2-cyclobuten-1-ones. Total synthesis of methyl linderone
作者:Hong Yin、Shubhada W. Dantale、Novruz G. Akhmedov、Björn C.G. Söderberg
DOI:10.1016/j.tet.2013.08.050
日期:2013.11
-2,3-substituted-2-cyclobuten-1-ones with N-bromo- or N-iodosuccinimide, affording in most cases 2-halomethylene-4-cyclopentene-1,3-dione, is described. This reaction was used in a short total synthesis of methyl linderone.
的4-(乙炔基)的反应的深入研究-4-羟基-2,3-二取代-2-环丁烯-1-酮与Ñ溴代或ñ碘代丁二酰亚胺,在大多数情况下2- halomethylene-得到描述了4-环戊烯-1,3-二酮。该反应被用于短时间的甲基邻苯二酚全合成。