First Entry to [4+2] Cycloadditions Involving 5-Amino-2-furanmethanols
摘要:
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.
From Furans to Anilines: Toward One-Pot Two-Step Amination/Diels−Alder Sequences
摘要:
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.
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.