[4-N-(3,4-dimethoxybenzyloxycarbonyl)-cytosin-1-yl]-acetic acid → N-[2-(Benzothiazole-2-sulfonylamino)-ethyl]-N-{[4-N-(3,4-dimethoxybenzyloxycarbonyl)-cytosin-1-yl]-acetyl}-glycine ethyl ester

Participants

Reaction Steps

The title compound (5.31 g, 81%) was synthesized by the reaction of N-[2-(benzothiazole-2-sulfonylamino)-ethyl]-glycine ethyl ester (3.26 g, 9.5 mmol) and [4-N-(3,4-dimethoxybenzyloxycarbonyl)-cytosin-1-yl]-acetic acid (3.28 g, 9.03 mmol) as per the procedure of Example 20. 1H NMR (500 MHz; DMSO-d6) δ 10.72 (s, 1H), 8.27 (dd, 1H), 8.17 (dd, 1H), 7.90 (d, 0.6H), 7.82 (d, 0.4H), 7.69˜7.62 (m, 2H), 7.02 (s, 1H), 7.00 (t, 1H), 5.09 (s, 2H), 4.80 (s, 1.2H), 4.61 (s, 0.8H), 4.34 (s, 0.8H), 4.13 (q, 0.8H), 4.05 (s, 1.2H), 4.03 (q, 1.2H), 3.75 (s, 3H), 3.74 (s, 3H), 3.58 (t, 1.2H), 3.42˜3.37 (m, 2H), 3.20 (t, 0.8H), 1.20 (t, 1.2H), 1.14 (t, 1.8H).

Provenance & Evidence