... a key building unit in numerous fine chemicals.(2) As a result, synthetic approaches toward primary amines have actively been pursued in organic synthesis. ... mg, 98%); 1 H NMR (600 MHz, DMSO-d 6 ) δ 8.70 (s, 3H), 7.51 (d, J = 7.3 Hz, 2H), 7.40–7.31 (m, 3H), 3.97 (s, 2H); 13 ...