Metal-free C(sp3)–H functionalization (C–C and C–N bond formation) of 1,2,3,4-tetrahydroacridines using deep eutectic solvents as catalyst and reaction medium

A simple and efficient protocol for the addition of azodicarboxylates (C–N bond) and maleimides (C–C bond) at the C4-position of 1,2,3,4-tetrahydroacridines was achieved under metal-free conditions using deep eutectic solvents with high atom efficiency, regioselectivity, and yields.