反应详情

To Boc-Gly-Ala-DAla-Gly-Gly-OBzl prepared as in Example 33C (17.2 g, 33.0 mmol) in glacial acetic acid (480 ml) was added 6 N HCl (120 ml) and the reaction mixture was stirred at room temperature for 24 h. Concentration in vacuo followed by coevaporation with water (2×250 ml) and toluene (2×250 ml) afforded 12.9 g (100% yield) of the product as a white powder: 1H NMR (D2O) δ 1.36 (d, J=6.9 Hz, 3 H), 1.38 (d, J=7.2 Hz, 3 H), 3.84 (s, 2 H), 3.96 (s, 2 H), 3.99 (s, 2 H), 4.30-4.36 (m, 2 H).

1. concentrationConcentration in vacuo