Reaction Steps
Reaction of oxalyl chloride (31 λL, 0.35 mmol) and benzoic acid 44 (92 mg, 0.24 mmol) with subsequent coupling to 3-pyridinylmethylamine (27 λL, 0.26 mmol) gave benzamide 45 (27 mg, 24%) as a clear gum: 1H NMR δ 9.22 (t, J=5.8 Hz, 1H, CONH), 8.57 (d, J=1.5 Hz, 1H, H-2′), 8.47 (dd, J=4.7, 1.5 Hz, 1H, H-6′), 8.00 (d, J=8.4 Hz, 2H, H-2, H-6), 7.88 (d, J=8.4 Hz, 2H, H-3, H-5), 7.74 (br d, J=7.8 Hz, 1H, H-4′), 7.57 (d, J=8.1 Hz, 1H, H-5″) 7.37 (dd, J=7.8, 4.7 Hz, 1H, H-5′), 7.27 (br s, 1H, H-3″), 7.18 (d, J=8.1 Hz, 1H, H-6″), 4.61 (s, 2H, CH2SO2), 4.51 (d, J=5.8 Hz, 2H, CH2N), 2.55 (s, 3H, CH3), 2.34 (s, 3H, CH3), 2.15 (s, 3H, CH3); MS m/z 476.6 (MH+, 100%). Anal. calcd for C26H25N3O4S.½CH3CO2CH2CH3: C, 64.72; H, 5.63; N, 8.09. Found: C, 64.72; H, 5.60; N, 7.75%.
