The oxirane ring of the dianhydro sugar 2 obtained from levoglucosan (1,6-anhydro-β-D-glucose) is opened regioselectively with organometallic carbon nucleophiles and its application to an asymmetric synthesis of the C1–C5 segment 9 together with the C9-C15 unit 18 of 6-deoxyerythronolide B 1 is described.
                                    由左旋
葡聚糖(
1,6-脱水-β-D-葡萄糖)制得的二脱
水糖2的
环氧乙烷环与有机
金属碳亲核试剂一起区域选择性地开放,并将其与C 1 –C 5链段9以及C 2 –C 5的不对称合成一起应用。描述了6-脱氧
赤藓醇内酯B 1的C 9 -C 15单元18。