27687-46-3Relevant articles and documents
Cyclobutane-cleavage of anti-head-to-head coumarin and quinolinone homo- and cross-dimers via single- and two-photon-absorption photochemistry
Bieniek, Nikolai,Inacker, Sebastian,Kim, Hee-Cheol,Hampp, Norbert
, (2021)
The light-driven cleavage of cyclobutane containing systems via [2 + 2] cycloreversion, such as di-coumarin, is an important yet poorly investigated photochemical reaction. Its applications can be found in smart crosslinking polymers or light-activated drug release. We report the increased cleavage efficiencies of the coumarins lactam analog quinolinone for single-photon as well as two-photon-absorption experiments. To investigate the structure-function relationship of the molecular substitution pattern and its influence on the photoactivity, a coumarin-quinolinone cross-dimer was synthesized and investigated towards its cleavage efficiencies in single-photon as well as two-photon photocleavage. The cross-dimer shows a lower cleavage efficiency than both homo-dimers. The presented results are of interest, e.g., for applications utilizing highly efficient cleavage reactions in symmetric or asymmetric molecular frameworks.
Chlorination Reaction of Aromatic Compounds and Unsaturated Carbon-Carbon Bonds with Chlorine on Demand
Liu, Feng,Wu, Na,Cheng, Xu
, p. 3015 - 3020 (2021/05/05)
Chlorination with chlorine is straightforward, highly reactive, and versatile, but it has significant limitations. In this Letter, we introduce a protocol that could combine the efficiency of electrochemical transformation and the high reactivity of chlorine. By utilizing Cl3CCN as the chloride source, donating up to all three chloride atom, the reaction could generate and consume the chlorine in situ on demand to achieve the chlorination of aromatic compounds and electrodeficient alkenes.
Synthesis of hydroxyl-containing oxindoles and 3,4-dihydroquinolin-2-ones through oxone-mediated cascade arylhydroxylation of activated alkenes
Zhang, Ming-Zhong,Liu, Long,Gou, Quan,Wang, Qi,Li, Yi,Li, Wan-Ting,Luo, Fei,Yuan, Min,Chen, Tieqiao,He, Wei-Min
supporting information, p. 8369 - 8374 (2020/12/28)
Hydroxyl-containing compounds are highly value-Added organic molecules, and the establishment of novel methodologies for their elaboration is a long-standing challenge in organic synthesis. Here the first oxone-mediated direct arylhydroxylation of activat