Syntheses and Crystal Structures of 1,5-Dioxaspiro[5.5]undecane-2,4-dione Derivatives
作者:Wulan Zeng、Yufeng Li、Huanmei Guo
DOI:10.1007/s10870-013-0408-z
日期:2013.4
The 3-(2,3,4-trimethoxybenzylidene)-1,5-dioxaspiro[5.5]undecane-2,4-dione 1 and 3-(3,4,5-trimethoxybenzylidene)-1,5-dioxaspiro[5.5]undecane-2,4-dione 2 have been synthesized and characterized by X-ray single-crystal diffraction, IR and UV–Vis. Compound 1 belongs to the orthorhombic system, space group Pna21 with a = 10.182(2) Å, b = 11.828(2) Å, c = 14.356(3) Å, α = 90°, β = 90°, γ = 90°, V = 1,729.0(6) Å3, Z = 4. Compound 2 is of Triclinic system, space group P-1 with a = 8.7807(18) Å, b = 9.4383(19) Å, c = 11.450(2) Å, α = 98.64(3)°, β = 103.28(3)°, γ = 99.44(3)°, V = 893.4(3) Å3, Z = 2. It is very interesting that there are only C–H···O and C–H···π intermolecular interaction in the 1, while there are still π···π stacking interactions except for C–H···O and C–H···π intermolecular interaction in the structure of 2. Two new spiro compounds, 3-(2,3,4-trimethoxybenzylidene)-1,5-dioxaspiro[5.5]undecane-2,4-dione 1 and 3-(3,4,5-trimethoxybenzylidene)-1,5-dioxaspiro[5.5]undecane-2,4-dione 2 have been synthesized and characterized by X-ray single-crystal diffraction, IR and UV–Vis.
合成了 3-(2,3,4-三甲氧基苯亚甲基)-1,5-二氧杂螺[5.5]十一烷-2,4-二酮 1 和 3-(3,4,5-三甲氧基苯亚甲基)-1,5-二氧杂螺[5.5]十一烷-2,4-二酮 2,并通过 X 射线单晶衍射、红外光谱和紫外可见光谱对其进行了表征。化合物 1 属于正方晶系,空间群为 Pna21,a = 10.182(2)埃,b = 11.828(2)埃,c = 14.356(3) Å, α = 90°, β = 90°, γ = 90°, V = 1,729.0(6) Å3, Z = 4.化合物 2 属于三linic 系统,空间群 P-1,a = 8.7807(18)埃,b = 9.4383(19)埃,c = 11.450(2) Å, α = 98.64(3)°, β = 103.28(3)°, γ = 99.44(3)°, V = 893.4(3) Å3, Z = 2.非常有趣的是,在 1 的结构中只有 C-H---O 和 C-H--π 分子间相互作用,而在 2 的结构中除了 C-H---O 和 C-H--π 分子间相互作用外,仍有π---π 堆积相互作用。合成了两种新的螺类化合物:3-(2,3,4-三甲氧基亚苄基)-1,5-二氧杂螺[5.5]十一烷-2,4-二酮 1 和 3-(3,4,5-三甲氧基亚苄基)-1,5-二氧杂螺[5.5]十一烷-2,4-二酮 2,并通过 X 射线单晶衍射、红外光谱和紫外可见光谱对其进行了表征。