Diels-Alder reactions with 2-substituted-α,β-unsaturated hydrazones in concentrated organic solutions of LiNTf2

Article abstract of DOI:10.1016/0040-4039(95)01949-I

α,β-Unsaturated hydrazones bearing an ester or a nitrile at C-2 position have been synthesized. They are unreactive towards electron-rich dienophiles but react with electron-poor dienophiles. Dramatic rate enhancements have been observed in concentrated organic solutions of LiNTf₂.