Synthesis of bicyclo[3.2.1]octanones via ketyl radical promoted rearrangements under reductive PET conditions

Enantiomeric organogelators fromd-/l-arabinose for phase selective gelation of crude oil and their gel as a photochemical micro-reactor

“…Finally, the suitability of the organogel for applications as a micro-reactor was tested by carrying out the photochemical reaction of 3 (Scheme 2). 16 Organogels from D-/L-1 are ideal for photochemical reactions due to the lack of any light absorbing chromophore in the gelator itself. A mixture of 3 and D-/L-1 in benzene was warmed and subsequently allowed to cool to room temperature, when a gel was formed.…”

Formation of an exceptionally stable ketene during phototransformations of bicyclo[2.2.2]oct-5-en-2-ones having mixed chromophores

“…In order to investigate the photoreaction of such enones, we observed a complete 1,2-acyl shift (1,2-AS) photoproduct formation when 1a-h have been irradiated (Scheme 1) [14,16]. We also observed that such a rearrangement took place very efficiently via a triplet-mediated pathway without use of any external sensitizer.…”

“…For several years, our laboratory (S. Lahiri et al) is primarily engaged in synthesizing various types of such multichromophoric systems to compare their photochemistry in detail [9][10][11][12][13][14][15]. Since in acyclic enones like C, E/Z-photoisomerization becomes one of the major energy dissipation pathways, we selected rigid bicyclic multichromophoric enones like D to minimize this route.…”

Unreactive Gel Networks as Versatile Confined Spaces for Enhanced Photoinduced Processes

“…After 1 h of irradiation, the analysis of the mixtures showed similar yield (88%) and kinetics to those obtained in solution. Furthermore, the gelator was also recovered from the mixture after column chromatography …”