Improved Method for Microwave-Assisted Synthesis of Benzodiazepine-2,5-diones from Isatoic Anhydrides Mediated by Glacial Acetic Acid
作者:Armando De La Cruz、Carlos Alejandro Vega-Acevedo、Ignacio Rivero、Daniel Chávez
DOI:10.21577/0103-5053.20180031
日期:——
1 H NMR (200 MHz, DMSO-d6) δ 3.58 (d, 2H, J 5.6 Hz, CH2), 7.10 (brd, 1H, J 8.0 Hz, H-9), 7.21 (ddd, 1H, J 8.0, 8.0, 1.2 Hz, H-7), 7.51 (ddd, 1H, J 8.0, 8.0, 1.6 Hz, H-8), 7.75 (dd, 1H, J 8.0, 1.6 Hz, H-6), 8.57 (t, 1H, J 5.6 Hz, NH-4), 10.37 (s, 1H, NH-1); 13 C NMR (50 MHz, DMSO-d6) δ 49.5, 126.0, 129.0, 130.6, 135.9, 137.4, 142.2, 173.2, 176.2; EIMS m/z (rel. int. %): [M] + 176 (100), 147 (51), 119
1 H NMR(200 MHz,DMSO-d6)δ3.58(d,2H,J 5.6 Hz,CH2),7.10(brd,1H,J 8.0 Hz,H-9),7.21(ddd,1H,J 8.0,8.0) ,1.2 Hz,H-7),7.51(ddd,1H,J 8.0、8.0、1.6 Hz,H-8),7.75(dd,1H,J 8.0、1.6 Hz,H-6),8.57(t,1H ,J 5.6 Hz,NH-4),10.37(s,1H,NH-1); 13 C NMR(50 MHz,DMSO-d6)δ49.5,126.0,129.0,130.6,135.9,137.4,142.2,173.2,176.2; EIMS m / z(相对于%):[M] + 176(100),147(51),119(54),92(34)。光谱数据与文献报道的一致。1-3