We report the first total synthesis of trachycladines A (10 steps, 34.2% overall yield) and B (11 steps, 35.0% overall yield) by using 5-deoxy-1,2,3-tri-O-acetyl-β-D-ribofuranose as the starting material. The critical step was the SnCl4 assisted regio- and steroselective deprotection of perbenzylated 1-O-methyl-5-deoxyribofuranose. The enzyme adenylate deaminase (EC 3.5.4.6) was successfully applied to the chemoenzymatic synthesis of trachycladines B.
我们报道了首次合成trachycladines A(10步,总产率34.2%)和B(11步,总产率35.0%),使用5-去氧-1,2,3-三-O-乙酰-β-D-核糖呋喃糖作为起始物质。关键步骤是SnCl4辅助的对苯甲酸保护的1-O-甲基-5-去氧核糖呋喃糖的区域和立体选择性去保护。酶腺苷酸脱氨酶(EC 3.5.4.6)成功应用于trachycladines B的化学酶合成。