反应详情

A solution of p-methoxybenzyl (6R,7R)-7-phenylacetamido-3-(trifluoromethyl-sulphonyloxy)ceph-3-em-4-carboxylate (60 mg, 0.102 mmol) in dichloromethane (10 ml) was cooled to 0° C., 2-Butyne (1.2 ml, 15.3 mmol) was added followed by diisopropylethylamine (18 μl, 0.102 mmol). The mixture was stirred and allowed to warm to room temperature over 15 min. Chromatography gave the title compound (28.4 mg, 57%), (Found: M+, 490.1562. C27H26N2O5S requires M, 490.1562); νmax (CH2Cl2) 1783, 1716, 1684 cm-1 ; δH (CDCl3) 1.79 (3H, s), 1.97 (3H, s), 3.62 (2H, ABq, J 16.1), 3.79 (3H, s), 4.07 (1H, br s), 4.79 (1H, d, J 4.8), 5.21 (2H, ABq, J 11.8), 5.89 (1H, dd, J 8.6, 4.8), 6.06 (1H, d, J 8.6), 6.86 (2H, d, J 8.6), 7.30 (7H, m); δc (CDCl3) 12.5, 13.2, 43.3, 45.6, 55.3, 59.8, 62.3, 67.1, 111.8, 113.9 (2c), 127.4, 127.7, 129.2 (2c) 129.5 (2c), 130.8 (2c), 133.7, 135.4, 142.5, 149.1, 159.9, 161.4, 164.4, 171.2.