JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2016, Vol. 40 ›› Issue (02): 88-94.doi: 10.3969/j.issn.1000-2006.2016.02.015

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Synthesis and ultraviolet absorption characteristics of 7-arylidene-isolongifolanene

RUI Jian1,XU Xu1, 2, 4,YANG Yiqing3,HUANG Jianfeng1,WANG Shifa1,3,4*   

  1. 1. College of Chemical Engineering, Nanjing Forestry University,Nanjing 210037,China;
    2. Jiangsu Key Laboratory Biomass Green Fuels and Chemicals, Nanjing 210037,China;
    3. College of Light Industry Science and Engineering, Nanjing Forestry Un
  • Online:2016-04-18 Published:2016-04-18

Abstract: A series of 7-arylidene-isolongifolanone a—j were synthesized by condensation of isolongifolanone with aromatic aldehydes including 4-bromobenzaldehyde, 4-fluorobenzaldehyde, 3-nitrobenzaldehyde, 2,4-dichlorobenzaldehyde under catalyzation of potassium tert-butoxide. The structures of compounds a—j were identified by means of 1H NMR, 13C NMR, GC-MS and FT-IR, and their ultraviolet absorption characteristics as well as light stabilities were also investigated. The results showed that compounds a, b, c, d and j exhibited good absorbency as the medium-wave ultraviolet(UVB)type absorbents,and compounds e, f, g, h and i had both functions as long-wave ultraviolet(UVA)and UVB absorbents. The light stability sequence of those compounds was h>g>e>c>a>d>b>f>i>j. The UV absorption intensity was d>i>e>h>g>f>b>c>j>a.

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