Synthesis and Structural Analysis of 5-Deoxy-5-[(<i>R</i>)- and (<i>S</i>)-methylphosphinyl]-α,β-D-manno- and -L-gulopyranoses
作者:Tadashi Hanaya、Katsuhiko Ohmori、Hiroshi Yamamoto、Margaret-Ann Armour、Alan M. Hogg
DOI:10.1246/bcsj.63.1174
日期:1990.4
Methyl 5,6-dideoxy-2,3-O-isopropylidene-6-nitro-α-D-lyxo-hex-5-enofuranoside (10) was prepared from D-mannose in 7 steps. Addition of methyl methylphosphinate to 10, followed by the catalytic hydrogenation and diazotization, afforded methyl 5-deoxy-2,3-O-isopropylidene-5-[(methoxy)methylphosphinyl]-α-D-lyxo-hexofuranoside, which was then converted into 6-O-triphenylmethyl and 6-O-tetrahydropyranyl
甲基 5,6-dideoxy-2,3-O-isopropylidene-6-nitro-α-D-lyxo-hex-5-enofuranoside (10) 由 D-甘露糖分 7 个步骤制备。甲基次膦酸甲酯加成到 10,然后催化氢化和重氮化,得到甲基 5-deoxy-2,3-O-isopropylidene-5-[(甲氧基)methylphosphinyl]-α-D-lyxo-hexofuranoside,然后将其转化转化为 6-O-三苯甲基和 6-O-四氢吡喃基衍生物 (14, 15)。通过用二氢双(2-甲氧基乙氧基)铝酸钠还原,然后酸水解,14 和 15 都提供了 D-吡喃甘露糖(连同小比例的 L-吡喃葡萄糖),其具有甲基亚膦基代替环氧。这些被转化为 1,2,3,4,6-penta-O-乙酰衍生物,其结构和构象由光谱学确定。