Abstract The analysis of a range of methyl ethers derived from methyl 7-deoxy- d - glycero -β- d - galacto -heptopyranoside ( 1 ) and methyl 7-deoxy- l - glycero -β- d - galacto -heptopyranoside ( 2 ) is examined in relation to their retention times in open-tubular gas—liquid chromatography, and to their electron-impact mass spectra and fragmentation patterns. In addition, the electron-impact and chemical-ionization
摘要分析了甲基7-脱氧-d-
甘油-β-d-半
乳糖-七
吡喃糖苷(1)和甲基7-脱氧-l-
甘油-β-d-半
乳糖-七
吡喃糖苷(2)衍生的一系列甲基醚检查了它们在开管气相色谱中的保留时间,以及它们的电子轰击质谱和碎裂模式。另外,描述了新型7-脱氧庚糖1和2的过乙酰化和过甲基化的糖苷和糖醇
乙酸酯的电子轰击和
化学电离质谱。提出了甲基2,3,4,6-四-O-乙酰基-7-脱氧-d-
甘油-β-d-半
乳糖-七
吡喃糖苷的片段化模式,并通过O-(三苯甲基乙酰化)进行了验证。