A ‘photorelease, catch and photorelease’ strategy for bioconjugation utilizing a p-hydroxyphenacyl group
作者:D. Madea、T. Slanina、P. Klán
DOI:10.1039/c6cc07496k
日期:——
strategy, which combines alkyne-azide cycloaddition between p-hydroxyphenacyl azide and alkyne derivatives to form a 1,2,3-triazole adduct and subsequent photochemical release of the triazole moiety via a photo-Favorskii rearrangement, is introduced. The first step can also involve photorelease of a strained alkyne and its Cu-free click reaction with azide.
It's alive: A ring‐strained alkyne based on dibenzo[a,e][8]annulene undergoes ring‐opening metathesis polymerization (ROMP) to give a high‐molecular‐weight poly(ortho‐phenylene) featuring alternating ethyl and ethynyl linkers along the polymer backbone. The molybdenum‐alkylidyne‐based catalyst system discriminates between strained and unstrained alkynes to yield a living polymer with an unparalleled
A photocatalytic active alkyne generation reaction was developed using cyclopropenone as a starting reagent. Visible light-responsive photocatalysts induced cyclopropenonedecarbonylation. The resulting highly reactive alkyne could be used directly, without isolation, for further reactions, such as in a dehydration condensation reaction and alkyne–azide click chemistry.
T-shaped and H-shaped polymers constructed from UV-induced strain promoted azide-alkyne cycloaddition reaction
作者:Wen Zhu、Zi Li、Peng Sun、Lixia Ren、Ke Zhang
DOI:10.1016/j.polymer.2016.01.027
日期:2016.3
Topological polymers with T-shaped and H-shaped molecular architecture were built on the combination of atom transfer radical polymerization (ATRP) and UV-induced strain promotedazide-alkynecycloaddition (SPAAC) reaction. In the presence of a cyclopropenone-masked dibenzocyclooctyne functionalized dibromo ATRP initiator, reactive polystyrene (PS) was synthesized to have a cyclopropenone-masked dibenzocyclooctyne
作者:Daniel W. Paley、Danielle F. Sedbrook、John Decatur、Felix R. Fischer、Michael L. Steigerwald、Colin Nuckolls
DOI:10.1002/anie.201300758
日期:2013.4.22
answer! An inactive, air‐stable, dimeric molybdenum alkylidyne complex is activated toward ring‐opening alkyne metathesis polymerization (ROAMP) by the addition of methanol. The ROAMP is compatible with water and phenol‐containing substrates and with the in situ photochemical generation of alkyne monomers from cyclopropenones.