Benzotriazol-1-yl Alkyl Carbonate, A New Convenient and Inexpensive Coupling Agent to Prepare an Active Ester for the Synthesis of Amide

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• m.p. 141–144°C; IR (KBr): 3107, 2938, 1753 cm−1 1H-NMR (CDCl3): σ 1.50 (3H, t, J=7.4Hz), 4.59 (2H, q, J=7.4Hz), 7.50–7.54 (1H, m), 7.73–7.77 (1H, m), 8.19 (1H, d, J=8.6Hz); ES-MS (m/z): 230 (M+Na)+, 208 (M+H)+, 164, 136
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