Imidazol-5-one as an Acceptor in Donor–Acceptor Cyclopropanes: Cycloaddition with Aldehydes
作者:Andrey A. Mikhaylov、Andrei V. Kuleshov、Pavel N. Solyev、Alexander A. Korlyukov、Pavel V. Dorovatovskii、Konstantin S. Mineev、Mikhail S. Baranov
DOI:10.1021/acs.orglett.0c00725
日期:2020.4.3
donor–acceptor (D–A) cyclopropanes in a formal cycloaddition reaction with aldehydes. The activation of such type of cyclopropanes is achieved with an equivalent of Brønsted acid. The reaction proceeds in high yields of 51–92% and demonstrates moderate diastereoselectivity at the quaternary stereocenter, which is determined by the electron-donating nature of the aldehyde partner. The ease of separation of stereoisomers
This work discovered that fluorescence protein chromophore analogs can undergo triplet excitation, enabling photo-crosslinking and photo-sensitizing chemistries. Exploration of these syntheticfluorescent protein chromophores resulted in photo-crosslinkers for biomolecules, photo-catalysts for organic reactions, and photosensitizers for chromophore-assisted light inactivation and photodynamic therapies