Synthesis and conformations of 2,3:4,5- and 2,4:3,5-di-O-isopropylidene-d-mannitol
作者:Krystyna Gawronska
DOI:10.1016/0008-6215(88)84059-x
日期:1988.5
Abstract The 2,3:4,5- ( 8 ) and 2,4:3,5-di- O -isopropylidene ( 10 ) derivatives of d -mannitol have been prepared from 1,6-di- O -benzoyl- d -mannitol and their structures established by 13 C-n.m.r. spectroscopy. The 1,3-dioxane rings in 10 adopt a skew conformation and the sugar carbon chain in 8 is bent around the C-3-C-4 bond, as found by i.r. data and molecular mechanics calculations. Oxidation
摘要从1,6-二-O-苯甲酰基-d制备了d-甘露醇的2,3:4,5-(8)和2,4:3,5-二-O-异亚丙基(10)衍生物。 -甘露醇及其结构由13 Cn.mr光谱确定。ir数据和分子力学计算发现,10中的1,3-二恶烷环采用偏斜构象,而8中的糖碳链围绕C-3-C-4键弯曲。用重铬酸吡啶鎓氧化8,得到2,3:4,5-二-O-异亚丙基-d-甘露醇-1,6-内酯(12)。