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 6N 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 (D20) 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