Partially Benzylated Derivatives of 6-Deoxy-D-glucose
作者:Shinkiti Koto、Naohiko Morishima、Yoko Mori、Hitoshi Tanaka、Seiichi Hayashi、Yumi Iwai、Shonosuke Zen
DOI:10.1246/bcsj.60.2301
日期:1987.6
Several partially benzylated derivatives of 6-deoxy-d-glucose (d-quinovose) were synthesized from appropriate di-O-benzyl-d-glucosides whose primary hydroxyl group is unprotected, via unimolar tosylation and subsequent reduction with LiAlH4.
Ditritylation of Methyl and Benzyl α-D-Gluco-, -Manno-, and -Galactopyranosides and Preparation of Their Partially Benzylated Derivatives
作者:Shinkiti Koto、Naohiko Morishima、Toyosaku Yoshida、Masaharu Uchino、Shonosuke Zen
DOI:10.1246/bcsj.56.1171
日期:1983.4
The ditritylation of methyl and benzyl α-D-gluco-, -manno-, and -galactopyranosides with trityl chloride in pyridine at 70 °C proceeds in a regioselective manner to give the 2,6-ditrityl ethers of the glucosides, the 3,6-ones of the mannosides, and both 2,6- and 3,6-ones of the galactosides. The rearrangement of the trityl group from O-3 to O-2 of the mannosides at 100 °C causes the selective formation
甲基和苄基 α-D-葡糖-、-甘露糖-和-吡喃半乳糖苷与三苯甲基氯在 70 °C 的吡啶中以区域选择性方式进行二三苯甲基化,得到葡萄糖苷的 2,6-二三苯甲基醚,即 3,甘露糖苷的 6 个,以及半乳糖苷的 2,6-和 3,6-一个。在 100 °C 时,甘露糖苷的三苯甲基从 O-3 重排为 O-2,导致 2,6-二三苯甲基醚的选择性形成。由2,6-和3,6-二三苯甲基醚制备吡喃己糖苷的3,4-和2,4-二苄基醚。
Synthesis of a branched d-glucoheptaose: The repeating unit of extracellular α-d-glucan 1355-S of Leuconostoc mesenteroides NRRL B-1355