Evolution of a Polyene Cyclization Cascade for the Total Synthesis of (−)-Cyclosmenospongine
作者:Klaus Speck、Thomas Magauer
DOI:10.1002/chem.201605029
日期:2017.1.23
We report a full account on the development of a unique cationic polyenecyclization for the total synthesis of the tetracyclic meroterpenoid (−)‐cyclosmenospongine. A highly convergent three‐component coupling strategy enabled rapid access to individual cyclization precursors that were tested for their reactivity. The successful transformation generates three rings and sets four consecutive stereocenters
[1,3] and [3,3] rearrangements of 3-amino-1,5-hexadienes: Solvent effect on the regioselectivity
作者:Heather K. Dobson、Richard LeBlanc、Hélène Perrier、Corey Stephenson、Teresa R. Welch、Dwight Macdonald
DOI:10.1016/s0040-4039(99)00455-4
日期:1999.4
3-Amino-1,5-Hexadienes rearrange under anionic conditions to give a [1,3] product in addition to the [3,3] (Cope) product. With some substrates the regioselectivity of the reaction is strongly influenced by the solvent polarity.