2002
First total syntheses of dihydroflustramine C and flustramine E, alkaloids from the marine bryozoan Flustra foliacea. Morales-Ríos Martha S., Suárez-Castillo Oscar R., Joseph-Nathan P. DOI: http://dx.doi.org/10.1016/S0040-4020(02)00011-X
Abstract
We have developed a simple and practical method for providing the common tricyclic skeleton of physostigmine type alkaloids, and demonstrated its utility for indole alkaloid synthesis. Thus, we achieved the firsttotalsyntheses of ()-dihydroflustramine C and ()-flustramine E, as well as the totalsyntheses of their debromoanalogues from the corresponding 2-hydroxyindolenines in five steps with 31, 27, 39 and 23% overall yields, respectively. The structures of some intermediates were confirmed by single crystal X-ray diffraction analyses.
Cleavage of alkoxycarbonyl protecting groups from carbamates by t-BuNH2
Synthesis of Indolylindolines Mediated by tert-BuNH2
Total Syntheses of Five Indole Alkaloids from the Marine Bryozoan Flustra foliacea
One-potsynthesis of conformationallyrestrictedspirooxindoles
13C NMR and crystallographic evidence of push-pull effects in furoindolic ?-enamino esters
Aromatic Bromination versus Oxidation of Indolylmalonates by Bromine
Stereochemical assignment of naturally occurring 2,3-epoxy-2-methylbutanoate esters