We report the discovery of a new bioorthogonalclick‐and‐release reaction involving iminosydnones and strained alkynes. This transformation leads to two products resulting from the ligation and fragmentation of iminosydnones under physiological conditions. Optimized iminosydnones were successfully used to design innovative cleavable linkers for protein modification, thus opening up new areas in the
Heterocycles by Cycloaddition. IV. Cycloaddition Reactions of Mesoionic Compounds with a 7-Azabicyclo[2.2.1]heptadiene, and Double Fragmentation of the Adducts
作者:Hiroshi Matsukubo、Hiroshi Kato
DOI:10.1246/bcsj.49.3314
日期:1976.11
Cycloaddition of some five-membered mesoioniccompounds with dimethyl 7-tosyl-7-azabicyclo[2.2.1]hepta-2,5-diene-2,3-dicarboxylate occurs only across the unsubstituted double bond. Pyrolysis of the adducts resulted in a double fragmentationreaction to give two five-membered aromatic heterocycles. A dithiolone adduct gave the S-oxide, which was pyrolyzed to the corresponding thiopyran-2-one.
The reflux of a meso-ioniccompound, 4-aryl-1,3,2-oxathiazolylium-5-olate(1), in toluene, chlorobenzene, or xylene gives another meso-ioniccompound, 2,5-diaryl-1,3-dithiolylium-4-olate(2), by a radical mechanism.
Photoclick and Release: Co‐activation of Carbon Monoxide and a Fluorescent Self‐reporter, COS or Sulfonamide with Fast Kinetics
作者:Miao Liu、Yuhan Wang、Zhicheng Yan、Jiabin Yang、Yongyou Wu、Dawei Ding、Xingyue Ji
DOI:10.1002/cbic.202200506
日期:2023.2
Photoclick and release: A cyclopropenone scaffold was employed as a strained alkyne precursor for bioorthogonal prodrug design. Such a photoclick-and-release system not only resolved the stability issues of strained alkynes but also exhibited multiple outputs and relatively fastkinetics.