The formal total synthesis of dragmacidin B, trans-dragmacidin C, and cis- and trans-dihydrohamacanthins A
作者:Neil K. Garg、Brian M. Stoltz
DOI:10.1016/j.tetlet.2005.02.054
日期:2005.4
A facile formal totalsynthesis of dragmacidinB, trans-dragmacidin C, and cis- and trans-dihydrohamacanthins A is presented. Our approach to these bis(indole) alkaloids involves a one-pot, four-step cross-coupling/deprotection sequence where complete halogen selectivity is observed. A related approach to access the dihydrohamacanthins is also described.
Synthesis of Marine Sponge Bisindole Alkaloids Dihydrohamacanthins
作者:Fumiko Y. Miyake、Kenichi Yakushijin、David A. Horne
DOI:10.1021/ol020002j
日期:2002.3.1
[structure: see text] A convergent synthesis of the marinesponge bisindole alkaloids dihydrohamacanthins is described. The synthesis centers on the construction of 3,5- and 3,6-linked pyrazinones and their reduction to the requisite piperazinones with sodium cyanoborohydride.