Specific photoreactions of flavanones typical of n,π* and π,π* characters in lowest triplet states
作者:Ryoka Matsushima、Katsuhisa Sakai
DOI:10.1039/p29860001217
日期:——
suggests the intermediacy of radicals in the ring-opening reaction. The marked variations in φ2, φ3, and φf with substituents are explicable in terms of relative contributions of n,π* and π,π* character in lowesttripletstates.
Transition metal free regio-selective C–H hydroxylation of chromanones towards the synthesis of hydroxyl-chromanones using PhI(OAc)<sub>2</sub> as the oxidant
作者:N. Viswanadh、Ganesh S. Ghotekar、Mahesh B. Thoke、R. Velayudham、Aslam C. Shaikh、M. Karthikeyan、M. Muthukrishnan
DOI:10.1039/c7cc08588e
日期:——
The chromanone scaffold is considered as a privileged structure in drug discovery. Herein, we report a highly efficient PhI(OAc)2 mediated regioselective, direct C–H hydroxylation of chromanones. This method offers easy access to substituted 6-hydroxy chromanones in moderate to good isolated yields, thus paving the way for their pharmaceutical studies.