“…1,2,3,4‐tetrahydroacridine (5 n) Yield 164.9 mg 90 % (Catalyst Ru2 ), 170.4 mg 93 % (Catalyst Ru3 ); 1 H NMR (400 MHz, CDCl 3 ) δ 7.95 (d, J =8.4 Hz, 1H), 7.72 (s, 1H), 7.63 (d, J =9.2 Hz, 1H), 7.57 (d, J =6.9 Hz, 1H), 7.39 (d, J =8.0 Hz, 1H), 3.09 (t, J =6.6 Hz, 2H), 2.91 (t, J =6.3 Hz, 2H), 1.97–1.92 (m, 2H), 1.86–1.80 (m, 2H). 13 C NMR (101 MHz, CDCl 3 ) δ 159.34, 146.66, 135.06, 131.02, 128.52, 128.30, 127.26., 126.95, 125.56, 33.62, 29.30, 23.29.…”