Studies towards the total synthesis of palau'amine. Formation of 4,5-dihydropyrrole-2-carboxylate intermediates by alkene–enamide ring-closing metathesis
作者:Jason D. Katz、Larry E. Overman
DOI:10.1016/j.tet.2004.06.140
日期:2004.10
A highly functionalized 4,5-dihydropyrrole-2-carboxylate is assembled by alkene-enamide ring-closing metathesis. Subsequent intramolecular azomethine imine dipolar cycloaddition provides a triazacyclopenta[cd]pentalene intermediate of potential use in a total synthesis of palau'amine. (C) 2004 Elsevier Ltd. All rights reserved.
Tandem radical cyclisations leading to indolizidinones and pyrrolizidinones
作者:S. Richard Baker、Andrew F. Parsons、Jean-François Pons、Michelle Wilson
DOI:10.1016/s0040-4039(98)01542-1
日期:1998.9
Reaction of various dehydroamino esters with tin hydrides resulted in 5-endo-5-exo or 5-endo-6-endo tandem cyclisation reactions. The preferred pathway was dependent on alkene substitution and the bicyclic products have potential application in indolizidine and pyrrolizidine alkaloidsynthesis.