I<sub>2</sub>-Mediated 2H-indazole synthesis via halogen-bond-assisted benzyl C–H functionalization
作者:Xiangli Yi、Lei Jiao、Chanjuan Xi
DOI:10.1039/c6ob01827k
日期:——
I2-Mediated benzyl C–H functionalization has been developed for the synthesis of 2H-indazoles, which features high efficiency, simple conditions and no need for metals. Mechanistic experiments and DFT calculations have revealed halogen bond assistance and a radical chain process for this reaction. The azo group and the bound iodine cooperate in the hydrogen abstraction step, which circumvents the thermodynamic
Evidence Against a Hydrogen Abstraction Mechanism in the Photorearrangement of Azoxybenzene to 2-Hydroxyazobenzene
作者:David J. W. Goon、N. G. Murray、Jean-Pierre Schoch、N. J. Bunce
DOI:10.1139/v73-573
日期:1973.12.1
In an attempt to distinguish between ionic and free radical mechanisms for the photorearrangement of azoxybenzene to 2-hydroxyazobenzene, aromatic azoxycompounds carrying C—H functions ortho to the azoxy linkage have been prepared and irradiated. The failure of these weaker C—H bonds to divert the reaction from its normal course argues against a hydrogen abstraction–hydroxyl transfer mechanism. This
The present invention relates to a method for amplifying a nucleic acid. More specifically, the present invention relates to a method for amplifying a nucleic acid in a light irradiation dependent manner under a substantially isothermal condition using a photo-responsive nucleic acid which may contain azobenzene residues and may reversibly change between cis and trans conformation by alternate exposure to visible light and UV light.
The present invention relates to a nucleic acid-based assembly comprising: at least one nucleic acid aptamer, and at least one nucleic acid motif designed to physically capture a drug, wherein the nucleic acid motif comprises one or more photo-responsive moieties that effect the release of the drug upon irradiation, wherein the aptamer and the nucleic acid motif each are covalently linked to one or more lipids, wherein the lipid-modified aptamer and nucleic acid motif form the assembly through noncovalent interaction. The invention further relates to use of the nucleic acid-based assembly in the treatment of cancer.