Synthesis and Crystal Structure of 1,2,3-Tri-O-acetyl-4,6-di-O-benzylidene-β-d-glucopyranose
作者:Marco Brito-Arias、Mariana Beltrán-Magaña、Candy Acosta-Santamaría、Judit Galcera、Elies Molins
DOI:10.1007/s10870-009-9594-0
日期:2010.1
The crystal of 1,2,3-Tri-O-acetyl-4,6-di-O-benzylidene-β-d-glucopyranose (I) was studied by X-ray diffraction. (I) crystallizes in the monoclinic space group P2 1 with cell parameters of a = 5.691(3) Å, b = 7.770(2) Å, c = 22.503(7) Å, b = 93.58(5)°, V = 993.1(7) Å3 and Z = 2. The molecular structure of (I) consists of a 4,6-O-benzylidene-glucopyranose moiety which has the 4-OH and 6-OH groups of the glucopyranose protected by glycosidic bonding to a benzylic carbon, forming a benzyl acetal. The other OH groups of the glucopyranose ring are also protected with three acetate groups. In the crystal structure adjacent molecules are linked by C–H···O hydrogen bonds. Summary sentence: Acetate and benzylidene protecting groups has been employed in the synthesis of 1,2,3-Tri-O-acetyl-4,6-di-O-benzylidene-β-d-glucopyranose (I) and its crystal structure has been determined from single crystal X-ray diffraction data.
1,2,3-三-O-乙酰基-4,6-二-O-亚苄基-β-d-吡喃葡萄糖(I)晶体通过X射线衍射进行了研究。(I)以单斜晶系P2 1结晶,晶胞参数为a=5.691(3) Å,b=7.770(2) Å,c=22.503(7) Å,β=93.58(5)°,V=993.1(7) Å3,Z=2。(I)的分子结构由4,6-O-亚苄基-吡喃葡萄糖部分组成,其中吡喃葡萄糖的4-OH和6-OH基团通过糖苷键与苄基碳相连,形成苄基缩醛。吡喃葡萄糖环的其他OH基团也通过三个乙酸酯基团进行保护。在晶体结构中,相邻分子通过C-H·O氢键相连。总结:在1,2,3-三-O-乙酰基-4,6-二-O-亚苄基-β-d-吡喃葡萄糖(I)的合成中使用了乙酸酯和亚苄基保护基团,其晶体结构通过