Photoinduced Addition Reactions in Aqueous Media

Abstract

The scope of this account on addition reactions in aqueous media is to demonstrate that the syntheses of useful targets or functionalizations can be accomplished through photoaddition reactions in benign environments. Ammination reactions of olefins and constrained cycloalkanes, addition products derived from quinonemethides, aromatic arylation reactions of furanones and alkenes, and radical addition reactions to , -unsaturated aldehydes performed in aqueous media constitute valuable reactions and hence interesting synthetic targets in organic syntheses. In studying these synthetic targets, different light sources are employed to achieve excitation. Also, photoinduced electron transfer sequences will account for the addition products. This account does exclude the photoaddition reactions performed by the aid of metals or metallic complexes, or the addition of perfluoroalkyl radicals to carbon-carbon and carbon-heteroatom multiple bonds in aqueous media. Keywords: Photoaddition in aqueous media, Photoinduced electron transfer addition in aqueous media, Radical additions in aqueous media. CN CN NC CN 42 43 44 44 43 NC CN NC CN dimerization CN CN NC CN -CN -CN NC CN PET Phen Phen h 1 Phen* A B -45 NC CN NC CN 46 Scheme 6.2. Mechanism for the NOCAS type product from coupling of 42, 43 and 44.

The Uranyl Cation as a Visible‐Light Photocatalyst for C(sp3)−H Fluorination

“…n-Alkanes provided amixture of fluorinated products at non-terminal positions ( Table 2, Entries 4a nd 5). Afluorinated motif that occupies aprivileged place in the fields of medicinal and agricultural chemistry is the trifluoromethylaryl [28] functional group.T op roduce this functionality,t oluene was subjected to the aforementioned reaction conditions to furnish benzyl fluoride in trace amounts,corresponding to aminimal consumption of starting material and NFSI;4 -cyanotoluene behaved similarly ( Table 2, Entries 6a nd 7).…”