论文部分内容阅读
以异长叶烷酮为原料,采用叔丁醇钾为催化剂,分别与对溴苯甲醛、对氟苯甲醛、间硝基苯甲醛、2,4-二氯苯甲醛等进行缩合反应,合成了系列7-芳亚甲基异长叶烷酮类化合物a—j。采用~1H NMR、~(13)C NMR、GC-MS和FT-IR等分析手段对合成所得7-芳亚甲基异长叶烷酮类化合物的结构进行了鉴定,并探索了化合物a—j的紫外吸收特性与光稳定性。结果表明:化合物a、b、c、d、j对中波紫外线(UVB)具有良好的吸收性能;而化合物e、f、g、h和i对长波紫外线(UVA)和UVB均具有较好的吸收性能。化合物a—j的光稳定顺序为h>g>e>c>a>d>b>f>i>j,其紫外线吸收强度顺序为d>i>e>h>g>f>b>c>j>a。
With different long-leaf alkyl ketone as raw materials, the use of potassium tert-butoxide as catalyst, respectively, and bromobenzaldehyde, p-fluorobenzaldehyde, m-nitrobenzaldehyde, 2,4-dichlorobenzaldehyde condensation reaction, synthesis A series of 7-arylmethylene iso-long-leaf alkane compounds a-j. The structure of the synthesized 7-arylmethylene isoflurane derivatives was identified by ~ 1H NMR, ~ 13 C NMR, GC-MS and FT-IR. The compounds a- UV absorption characteristics and photostability. The results showed that the compounds a, b, c, d, j had good absorption properties for UVB and the compounds e, f, g, h and i had good UVA and UVB Absorption performance. The order of light absorption of compound a-j is h> g> e> c> a> d> b> f> i> j, and the UV absorption intensity order is d> i> > j> a.