metal counterion it is possible to regioselectively cleave with a variety of nucleophiles, the epoxide ring of benzyl 3, 4- anhydro-β-D -ribopyranoside. The resulting 3-deoxy 3-substituted or 4-deoxy 4-substituted glycosides were obtained in good yields. Factors governing the regiochemistry of ring opening are discussed.
由
金属反离子的适当选择,能够区域选择性裂开与各种亲核试剂,苄基3的
环氧化物环,4-脱
水-β-d -ribopyranoside。以良好的产率获得了所得的3-脱氧3-取代的或4-脱氧4-取代的糖苷。讨论了控制开环区域
化学的因素。