2011
Absolute configuration assignment of 3-oxindolylacetyl-4-phenyloxazolidinone derivatives. Oscar R. Suárez-Castilloa, , , Myriam Meléndez-Rodrígueza, Luis E. Castelán-Duartea, Erick A. Zúñiga-Estradaa, Julián Cruz-Borbollaa, Martha S. Morales-Ríosb, Pedro Joseph-Nathanb, Tetrahedron: Asymmetry 2011, 22, 2085209 http://dx.doi.org/10.1016/j.tetasy.2011.11.018,
Abstract
The straightforward determination of the absolute configuration of 2-oxo-3-indolylacetic acid derivatives 5ae, based on analysis of the 1H NMR spectra of their oxindolylacetyl-phenyloxazolidinones 6ae, is described. The conformational preferences for two diastereomeric amides were calculated by DFT, which matched well with the experimental results, while X-ray diffraction analysis allowed us to validate the methodology. Independent absolute configuration evidence was also obtained by vibrational circular dichroism.
Total Syntheses of Five Indole Alkaloids from the Marine Bryozoan Flustra foliacea
Transesterifications mediated by t-BuNH2
Aromatic Bromination versus Oxidation of Indolylmalonates by Bromine
Unimolecular rearrangements of ketene-O,O-acetals and fragmentations occurring in the gas phase
Cleavage of alkoxycarbonyl protecting groups from carbamates by t-BuNH2
One-potsynthesis of conformationallyrestrictedspirooxindoles
Synthesis of Indolylindolines Mediated by tert-BuNH2
Synthesis of 6-bromo-2-arylindoles using 2-iodobenzoic acid as precursor