- Photosensitive double helix chiral fluorescent compound based on 5,6-disubstituted phenanthrene and derivatives thereof and synthesis method of photosensitive double helix chiral fluorescent compound
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The invention provides a photosensitive double helix chiral fluorescent compound based on 5,6-disubstituted phenanthrene and derivatives thereof and a synthesis method of the photosensitive double helix chiral fluorescent compound. The diarylethene type molecular structure with a double helix structure is synthesized and separated by taking 5,6-heterocyclic diarylethene substituted phenanthrene or5,6-heterocyclic diarylethene substituted-9,10-phenanthroline as a basic structural framework of photoresponsiveness. According to the synthesis method disclosed by the invention, a helical structurewith rotational steric hindrance is introduced to serve as a structural unit for improving the specific rotation; the helical structure is fused with a photoresponse structure; energy level transition/or molecular heterogeneity is caused by exciting molecules through specific light, which leads to obvious change of a chiral structure and further the photoresponisveness of the molecular optical activity is represented; the photosensitive double helix chiral fluorescent compound based on the 5,6-disubstituted phenanthrene can be applied to the production of special optical films, anti-counterfeiting identification, special optical fiber products and luminescent film devices.
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Paragraph 0059; 0061; 0062
(2018/12/14)
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- PREPARATION AND SYNTHETIC UTILIZATION OF 3-(ADENIN-9-YL)-2-HYDROXYALKANOIC ACIDS AND THEIR DERIVATIVES
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Condensation of adenine and its substituted derivatives with 1,1-dialkoxy-2-bromoalkanes afforded substituted 2-(adenin-9-yl)-1,1-dialkoxyalkanes I and IV.Acid hydrolysis of I or IV, followed by reaction with alkali metal cyanides and acid hydrolysis, gave substituted 3-(adenin-9-yl)-2-hydroxyalkanoic acids II, V and VI.Methyl esters of these compounds (VIII) were converted into 3-(adenin-9-yl)alkane-1,2-diols IX by reduction with sodium borohydride. 3-(Adenin-9-yl)-2-methoxypropanoic acid (XVII) was obtained by oxidation of 9-(3-hydroxy-2-methoxypropyl)adenine (XVI)with sodium periodate; 4-(adenin-9-yl)-2-(S)-hydroxybutanoic acid (XXVII) was synthesized by oxidation of 9-(S)-(2-tetrahydropyranyloxy-4-hydroxybutyl)adenine (XXV), prepared from diethyl L-malate.Acid hydrolysis of XXV afforded 9-(S)-(2,4-dihydroxybutyl)adenine (XXVI). 4-(Adenin-9-yl)-3-hydroxypentanoic acid (XXIX) was obtained by reaction of malonic acid with 2-(adenin-9-yl)-1,1-diethoxypropane (IVa) in water.
- Holy, Antonin
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p. 2148 - 2166
(2007/10/02)
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