反应详情

4′-C-(Aminomethyl)thymidine (4) (0.025 g, 0.1 mmol), N-(9-fluorenylmethyloxycarbonyl)leucine (0.071 g, 0.2 mmol), TSTU (0.09 g, 0.3 mmol) and diisopropylethylamine (0.065 g, 0.5 mmol, 0.087 mL) were combined in DMF (1 mL) according to the procedure used to prepare compound (19). The title compound (20) was obtained as an amorphous solid (0.056 g). δH(300 MHz, CD3OD) 7.86–7.37(8H, m, Fmoc), 7.74(1H, s, H-6), 6.24(1H, dd, H-1′), 4.56(1H, dd, H-3′), 3.68(2H, 2d, H-5′), 3.40(2H, 2d, 4′-C—CH2), 2.37(2H, m, H-2′), 1.70(3H, m, leucyl CH, CH2), 1.66(3H, s, 5-CH3), 1.05(3H, d, leucyl CH3), 1.02(3H, d, leucyl CH3); ES +ve m/z 607(M+H)+, 629(M+Na)+.