4707-72-6Relevant academic research and scientific papers
Anthraquinon-2-ylmethoxycarbonyl (Aqmoc): A new photochemically removable protecting group for alcohols
Furuta, Toshiaki,Hirayama, Yuuki,Iwamura, Michiko
, p. 1809 - 1812 (2007/10/03)
(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.
Preparation and Chemical Behaviour of exo-Methylene Compounds: Isoelectronic Compounds of 5-Methylenecyclohexa-1,3-diene
Sugimoto, Akira,Yamano, Junzo,Yasueda, Masahiro,Yoneda, Shigeo
, p. 2579 - 2584 (2007/10/02)
Some exo-methylene compounds such as 9-methylene-9,10-dihydrophenanthrene(2) were photolytically prepared and their chemical behaviour was investigated.Treatment of (2) with acid (CF3CO2H) or base (OBut(1-)) led to the formation of 9-methylphenanthrene, with bromine to 9-bromomethylphenanthrene.Reaction with dimethyl acetylenedicarboxylate did not give Diels-Alder adduct but give an ene adduct.Treatment with ethenetetracarbonitrile also gave an ene adduct.Reaction with carbene or carbenoids gave 9,10-dihydrophenanthrene-9-spirocyclopropanes.Reaction with ethenetetracarbonitrile was examined for other exo-methylene compounds, 1-methylene-1,2-dihydronaphtalene and 2-methylene-2,3-dihydrobenzothiophene.The aromatisation may be responsible for the reactions of these exo-methylene compounds except for the reaction with carbenes.
