Facile synthesis of photoactive diaryl(hetaryl)cyclopentenes by ionic hydrogenation
作者:Andrey G. Lvov、Ekaterina Yu. Bulich、Anatoly V. Metelitsa、Valerii Z. Shirinian
DOI:10.1039/c6ra11791k
日期:——
comprising a cyclopentene ring as an ethene bridge was developed based on reduction of 2,3-diaryl(hetaryl)cyclopent-2-en-1-ones through an ionichydrogenation reaction. The method provides access to unsymmetrical photoswitchable diarylethenes containing benzene, thiophene, or azoles (thiazole, oxazole, imidazole) as aromatic moieties in 40–71% yields. Diarylethenes comprising two heterocyclic moieties show
Photoinduced Skeletal Rearrangement of Diarylethenes Comprising Oxazole and Phenyl Rings
作者:Andrey G. Lvov、Valerii Z. Shirinian、Vadim V. Kachala、Alexey M. Kavun、Igor V. Zavarzin、Mikhail M. Krayushkin
DOI:10.1021/ol502073t
日期:2014.9.5
A novel photochemical rearrangement of diarylethenes bearing oxazole and benzene derivatives as aryl moieties that results in the formation of polyaromatic systems was investigated. The mechanism of the transformation includes photocyclization, sequential [1,9] and [1,3]-hydrogen shifts, as well as a lateral oxazole ring-opening process. It was shown that this reaction can be an effective synthetically
Skeletal photoinduced rearrangement of diarylethenes: ethene bridge effects
作者:A. V. Zakharov、S. M. Timofeeva、A. V. Yadykov、M. M. Krayushkin、V. Z. Shirinian
DOI:10.1039/d2ob02315f
日期:——
A skeletal photorearrangement involving UV-induced 6π-electrocyclization of diarylethenes with various ethene bridges has been studied. It has been found that deprotonation is the predominant step among the three possible alternative reaction pathways (radical abstraction, deprotonation, or sigmatropic shift) following 6π-electrocyclization, and incorporation of an electronegative carbonyl group into