1392829-98-9Relevant academic research and scientific papers
SINGLET OXYGEN-LABILE LINKERS AND METHODS OF PRODUCTION AND USE THEREOF
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Paragraph 000123; 000127, (2013/11/18)
Activatable compositions that include at least one functional moiety and at least one cleavable linker directly or indirectly linked to the at least one functional moiety are disclosed. The at least one functional moiety is inactive when linked to the linker and activated upon cleavage of the linker. Methods of production and use of the activatable composition are also disclosed.
Synthesis and singlet oxygen reactivity of 1,2-diaryloxyethenes and selected sulfur and nitrogen analogs
Nkepang, Gregory,Pogula, Praveen K.,Bio, Moses,You, Youngjae
, p. 753 - 759 (2012/09/05)
1,2-Diaryloxyethene has recently been proposed as a linker in singlet oxygen-mediated drug release. Even though 1,2-diaryloxyethenes look very simple, their synthesis was not an easy task. Previous methods are limited to symmetric molecules, lengthy step and low yield. We report on a facile synthetic method not only for 1,2-diaryloxyethenes but also their sulfur and nitrogen analogs in yields ranging from 40 to 90% with more than 90% purity at the vinylation reaction. Most recently, light-controlled drug release systems were proposed, where singlet oxygen generated from low energy light and a photosensitizer cleaves electron-rich alkenes, e.g. 1,2-diaryloxyethene. However, the synthesis of 1,2-diaryloxyethene was not well established. Herein, we report a facile synthesis of 1,2-diaryloxyethenes and its sulfur and nitrogen analogs. Model compounds were prepared in four steps from 4-phenylphenol via Ullman-type coupling reaction.
