... E-mail: hn.gopi@iiserpune.ac.in ... acids, thioacids have recently gained momentum due to their unique reactivity and selectivity in the amide bond formations.(32-34) Williams et al ... 1493, 1468, 1435, 1319, 1260, 755, 696; 1 H NMR (400 MHz; CDCl 3 ) δ 7.70 (br, 1H), 7.5 (d, 2H, J ...