A series of enantiopure tricyclic isoindolinones has been successfully synthesized through a one-pot selective cascade process from furan derivatives. The synthesis is straightforward and gave good overall yields taking into account the concomitant formation of five C-C, C-O, and C-N bonds. The strategy was extended to the preparation of a thiazolidine analogue.
From Furans to Anilines: Toward One-Pot Two-Step Amination/Diels−Alder Sequences
Selective metal-free amination and Diels-Alder reactions are described in the furan series, leading to polysubstituted anilines or to stable oxabicyclic adducts in high yield. Interestingly, anilines are conveniently prepared through a novel one-pot, two-step amination/Diels-Alder procedure from commercially available 5-bromo-2-furaldehyde.
First Entry to [4+2] Cycloadditions Involving 5-Amino-2-furanmethanols
The preparation of new 5-amino-2-furanmethanols bearing various amino and primary or secondary alcohol groups is described. The structures of 5-amino-2-furanmethanols as dienes are consistent with (1)H NMR data and cyloadditions of them allows the selective synthesis of tetrasubstituted aminobenzylic alcohols, amino phenols or lactones through Diels-Alder reactions.
5-Amino-2-furylmethylamines - Appealing Precursors of Aminoisoindolinones?
Isoindolinones were constructed according to an original [4+2]-cycloaddition strategy. Unprecedented 5-amino-2-furyl-methylamines were prepared and revealed as efficient precursors of new aminoisoindolinones, obtained via a Diels-Alder and lactamization sequence.
A facile preparation of trisubstituted amino-furan and -thiophene derivatives
β-Alkylation of amino-furan and -thiophene heterocycles is described through metal-, acid- and base-free carbon–carbon bond formation. The ability of both heterocycles to undergo selective β-alkylation is compared by mean of experimental and theoretical data. The presence of chiral amine substituents induced the diastereoselective generation of the newly formed additional stereocenter.