Dearomative Cycloadditions Utilizing an Organic Photosensitizer: An Alternative to Iridium Catalysis
作者:Alessa B. Rolka、Burkhard Koenig
DOI:10.1021/acs.orglett.0c01622
日期:2020.7.2
A highly efficient, cheap, and organic alternative to the commonly used iridium photosensitizer (Ir[dF(CF3)ppy]2(dtbpy))PF6 ([Ir–F]) is presented for visible-light energy transfer catalysis. The organicdye 2CzPN surpasses [Ir–F] in selectivity while at the same time being easily accessible in one step. The catalyst is recyclable and, due to its uncharged nature, soluble in nonpolar solvents such as
Dearomative Cascade Photocatalysis: Divergent Synthesis through Catalyst Selective Energy Transfer
作者:Michael J. James、Jonas Luca Schwarz、Felix Strieth-Kalthoff、Birgit Wibbeling、Frank Glorius
DOI:10.1021/jacs.8b03302
日期:2018.7.18
The discovery and application of dearomative cascade photocatalysis as a strategy in complex molecule synthesis is described. Visible-light-absorbing photosensitizers were used to (sequentially) activate a 1-naphthol derived arene precursor to divergently form two different polycyclic molecular scaffolds through catalyst selective energy transfer.