Total synthesis of (−)-nakadomarin A: alkyne ring-closing metathesis
作者:Pavol Jakubec、Andrew F. Kyle、Jonás Calleja、Darren J. Dixon
DOI:10.1016/j.tetlet.2011.09.016
日期:2011.11
A 13-step, highly stereoselective synthesis of (−)-nakadomarin A has been achieved using the combination of a bifunctional organocatalyst controlled Michael addition, a nitro-Mannich/lactamization cascade, an alkyne ring-closing metathesis/syn-reduction, and furan/iminium ion cyclization/reduction as key steps.
作者:Simone Bonazzi、Bichu Cheng、Joseph S. Wzorek、David A. Evans
DOI:10.1021/ja404673s
日期:2013.6.26
The convergent synthesis of the polycyclic alkaloid (-)-nakadomarin A (1) is reported. The synthesis plan identified macrocyclic lactam 4 as one of the important synthons (eight steps). The other synthon (five steps) was bicyclo[6.3.0] lactam 5 containing a single stereocenter that controlled all of the subsequent stereochemistry during the assembly process. A silyl triflate-promoted cascade of 4 and