1027261-59-1

Upstream product

• 17241-59-7 2-Hydroxymethylanthraquinone 
• 7693-46-1 4-Nitrophenyl chloroformate 
• 84-54-8 2-methylanthracene-9,10-dione 
• 7598-10-9 2-(bromomethyl)anthraquinone 

Relevant academic research and scientific papers

Unraveling the Photodeprotection Mechanism of Anthraquinon-2-ylmethoxycarbonyl-Caged Alcohols Using Time-Resolved Spectroscopy

Anthraquinone (AQ) compounds have been used as photolabile protecting groups (PPGs) to protect alcohols, ketones, and carboxylic acids. However, because of the lack of direct spectroscopic information for the transient species and intermediates related with the deprotection reaction(s), the photorelease mechanism(s) of these systems are still largely unknown. In this contribution, we detail a time-resolved spectroscopic investigation using anthraquinone-protected galactose (1) and adenosine (2) to investigate the photodeprotection reaction mechanism(s) of these kinds of AQ-PPGs. It was found that, in THF-H2O solvents, the ketyl radical species generated for 1 and 2 was found to be a reactive intermediate that then formed a dihydroxyanthracene species. The photodeprotection then occurred with the accompaniment of a decarboxylation process. These results provide an improved understanding for how AQ-PPGs work and will help assist in the design and applications of selected anthraquinone derivatives as a PPG platform, especially in aqueous environments more relevant for use in biological systems.

PHOTOBASE GENERATOR

There is intended to provide the novel compounds which generate a base easily when irradiated with long wavelength light (active energy rays), a photobase generator containing the compounds and a photobase generation method, and the present invention relates to the compounds represented by the general formula [1], a photobase generator containing the compounds and a photobase generation method: (wherein, Ar represents any of groups with specific structures selected from the group consisting of an anthracenyl group, an anthraquinonyl group and a pyrenyl group; R1 and R2 each independently represent a hydrogen atom or a linear, branched or cyclic alkyl group having 1 to 10 carbon atoms, or represent ones which can form an alicyclic ring containing nitrogen atom(s) or an aromatic ring containing nitrogen atom(s) together with a nitrogen atom to which they are bound, which the rings having 3 to 8 carbon atoms which may have a substituent, R3 and R4 each independently represent a hydrogen atom, a linear, branched or acyclic alkyl group having 1 to 10 carbon atoms).

Anthraquinon-2-ylmethoxycarbonyl (Aqmoc): A new photochemically removable protecting group for alcohols

(formula presented) Synthesis and photochemistry of a new photochemically removable protecting group for alcohols is described. Four carbonates of galactose derivatives (1-4) were synthesized from the corresponding arylmethanols via 4-nitrophenyl carbonate intermediates. Among them, photolysis of anthraquinon-2-ylmethoxycarbonyl (Aqmoc) galactose (1) proceeded with overall photolysis efficiency of 150 (quantum yield 0.10, and molar absorptivity 1500 M-1 cm-1) and rate constant of ～106 s-1. To demonstrate its application to a biologically related molecule, 5′-Aqmoc-adenosine (5) was synthesized and photolyzed to yield adenosine in 91% yield.