Stefano Protti
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View article: Chemometric Optimization of BF <sub>3</sub> ·OEt <sub>2</sub> ‐Mediated Cyclization of Cannabidiol to Rare Δ⁴‐ and <i>Iso</i> ‐THC Isomers
Chemometric Optimization of BF <sub>3</sub> ·OEt <sub>2</sub> ‐Mediated Cyclization of Cannabidiol to Rare Δ⁴‐ and <i>Iso</i> ‐THC Isomers Open
The acid‐catalyzed conversion of cannabidiol (CBD) to tetrahydrocannabinol and iso‐tetrahydrocannabinol derivatives is a well‐established synthetic strategy. However, since the reaction outcome is strongly dependent on the conditions, a ca…
View article: Visible-Light-Mediated Radical Truce–Smiles Rearrangement via Arylazo Sulfones
Visible-Light-Mediated Radical Truce–Smiles Rearrangement via Arylazo Sulfones Open
We present a photocatalyst-free, visible-light-mediated Truce-Smiles rearrangement (TSR) for the selective difunctionalization of olefins by exploiting photoactivatable arylazo sulfones as sulfonyl radical precursors. This method efficient…
View article: Photocatalyzed Reduction of β‐Nitroacrylates via Hydrogen Atom Transfer Promoted by Tetrabutylammonium Decatungstate
Photocatalyzed Reduction of β‐Nitroacrylates via Hydrogen Atom Transfer Promoted by Tetrabutylammonium Decatungstate Open
A photocatalyzed reduction of the CC double bond in β‐nitroacrylates under flow conditions is developed. The reaction takes place upon irradiation at 390 nm in the presence of tetrabutylammonium decatungstate and requires γ‐terpinene as a…
View article: “On Water” Photochemistry: Visible‐Light‐Induced Synthesis of Diaryl Sulfides by Nitrogen Extrusion
“On Water” Photochemistry: Visible‐Light‐Induced Synthesis of Diaryl Sulfides by Nitrogen Extrusion Open
A blue light‐induced extrusion strategy allows for the synthesis of valuable diaryl sulfides from an aqueous suspension of diazoaryl sulfides under (photo)catalyst‐ and additive‐free conditions. The incorporation of the N═N─S dyedauxiliary…
View article: Visible Light‐Promoted Esterification of Carboxylic Acids via Photoacid Generation Catalysis
Visible Light‐Promoted Esterification of Carboxylic Acids via Photoacid Generation Catalysis Open
The ester functionality is ubiquitously found in natural products, pharmaceuticals, and perfumes. Among the various methods of ester synthesis, the acid‐catalyzed coupling of carboxylic acids with alcohols is the most common approach. Here…
View article: Biobased carbon dots as photoreductants – an investigation by using triarylsulfonium salts
Biobased carbon dots as photoreductants – an investigation by using triarylsulfonium salts Open
We investigated the potential application of six types of carbon dots (CDs) obtained from different organic sources as photoreductants. Such carbon nanomaterials were synthesized by two different approaches, either hydrothermal or pyrolyti…
View article: Water Effect on the Photochemistry of Arylazo Sulfonates
Water Effect on the Photochemistry of Arylazo Sulfonates Open
The effect of water on visible-light-driven generation of aryl radicals or aryl cations from colored shelf-stable arylazo sulfonates has been investigated. Photoinduced ionic and radical decomposition of these salts compete, depending on t…
View article: Recent Developments in Radical Mediated Synthesis of Organostannanes.
Recent Developments in Radical Mediated Synthesis of Organostannanes. Open
The present review aims to provide an overview of the recent developments in the preparation of aryl‐ or alkenyl stannanes via carbon‐ and tin‐centered radicals enabling chemists to synthesize organostannyl derivatives with high efficiency…
View article: Tuning the Efficiency of Iridium(III) Complexes for Energy Transfer (EnT) Catalysis through Ligand Design
Tuning the Efficiency of Iridium(III) Complexes for Energy Transfer (EnT) Catalysis through Ligand Design Open
Photoactive Iridium(III) complexes are a popular synthetic tool. The impact of ligand design on their photoredox properties has been widely studied, but similar approaches to develop more potent photosensitizers are still absent. We report…
View article: Recent advances in visible light-driven phosphine-mediated transformations
Recent advances in visible light-driven phosphine-mediated transformations Open
The review presents a survey of the latest advancements in light- and phosphine-mediated C–C and C-heteroatom bond formation.
View article: Automated One‐Pot Library Synthesis with Aldehydes as Radical Precursors
Automated One‐Pot Library Synthesis with Aldehydes as Radical Precursors Open
The increased demand for the synthesis of Csp 3 enriched motifs and the urgency of discovering new drugs requires the development of more efficient technologies and synthetic tools to accelerate drug discovery processes. Herein, we report …
View article: Introduction of the year 2023
Introduction of the year 2023 Open
In the introduction chapter we introduce the volume and its three sections, namely critical reviews, highlights on recent “hot” topics and SPR lectures in photochemistry. Furthermore, the chapter includes the most significant editorial rel…
View article: Visible‐Light Enabled Synthesis of 1‐Aryl‐3‐Sulfonylmethyl‐1,2,4‐Triazoles by Arylazo Sulfones
Visible‐Light Enabled Synthesis of 1‐Aryl‐3‐Sulfonylmethyl‐1,2,4‐Triazoles by Arylazo Sulfones Open
We present a novel and highly efficient method for synthesizing polyfunctionalized 1,2,4‐triazoles. This approach leverages visible light and arylazo sulfones in combination with N ‐vinyl amides, in the environmentally friendly solvent eth…
View article: Dual Lewis Acid Promoted/Visible Light Driven Preparation of Aryl Diazenyl Oxazoles from Isocyanoacetamides and Arylazo Sulfones
Dual Lewis Acid Promoted/Visible Light Driven Preparation of Aryl Diazenyl Oxazoles from Isocyanoacetamides and Arylazo Sulfones Open
While arylazo sulfones have been widely applied as arylating agents, their exploitation for diazenylation reactions has been previously limited to electron‐rich alkenes such as styrenes and silyl enol ethers. Herein we optimized a syntheti…
View article: Organophotocatalyzed C−Si Bond Fragmentation Using Silyl Ethers as Radical Precursors
Organophotocatalyzed C−Si Bond Fragmentation Using Silyl Ethers as Radical Precursors Open
In this work, silyl ethers of phenols and alcohols have been successfully prepared and tested as neutral carbon (silicon) centered radical precursors. The organophotocatalyzed oxidation (by the Fukuzumi catalyst) of these ethers caused the…
View article: Automated One-pot Library Synthesis with Aldehydes as Radical Precursors
Automated One-pot Library Synthesis with Aldehydes as Radical Precursors Open
The increased demand for the synthesis of enriched hybridized Csp3 motifs and the urgency of discovering new drug molecules require the development of more efficient technologies and synthetic tools to accelerate drug discovery processes. …
View article: Visible Light‐promoted C(<i>sp</i><sup>3</sup>)‐H α‐Carbamoylation of Cyclic Ethers with Isocyanides
Visible Light‐promoted C(<i>sp</i><sup>3</sup>)‐H α‐Carbamoylation of Cyclic Ethers with Isocyanides Open
A protocol exploiting isocyanides as carbamoylating agents for the α‐C( sp 3 )‐H functionalization of cyclic ethers has been optimized via a combined visible light‐driven hydrogen atom transfer/Lewis acid‐catalyzed approach. The isocyanide…
View article: Photochemical Vs Thermal Acid Catalysed Cyclization of Cannabigerol (CBG): An Unexpected Selectivity
Photochemical Vs Thermal Acid Catalysed Cyclization of Cannabigerol (CBG): An Unexpected Selectivity Open
The reactivity of Cannabigerol (CBG, 1 ) in organic solvents under photochemical and acid catalyzed conditions has been investigated in detail. The obtained results pointed out the presence of different reaction paths in the photochemical …
View article: Effect of Sustainable and Confined Media on the Photoinduced [6π]‐Electrocyclization Reaction of Diphenyl and N‐Methyldiphenylamines
Effect of Sustainable and Confined Media on the Photoinduced [6π]‐Electrocyclization Reaction of Diphenyl and N‐Methyldiphenylamines Open
A systematic investigation of the photoinduced [6π]‐electrocyclization reaction of diphenylamine and N‐methyldiphenylamine has been carried out under steady‐state and time‐resolved conditions in homogeneous (cyclohexane, acetonitrile and m…
View article: Photodegradation of cannabidiol (CBD) and Δ9-THC in cannabis plant material
Photodegradation of cannabidiol (CBD) and Δ9-THC in cannabis plant material Open
Δ 9 - THC, the psychotropic cannabinoid in Cannabis sativa L., for many years has been the focus of all the pharmacological attention as the main promising principle of the plant. Recently, however, cannabidiol (CBD) has brought a sudden c…
View article: Visible Light Catalyzed Stannylation of Aryl Halides
Visible Light Catalyzed Stannylation of Aryl Halides Open
A visible light‐mediated strategy for the preparation of aromatic stannanes from aryl halides (mostly aryl bromides) is presented herein. The reaction proceeds under metal‐ and additive‐free conditions and exhibits a broad substrate scope.…
View article: Visible photons for the regioselective nucleophilic ring opening of epoxides
Visible photons for the regioselective nucleophilic ring opening of epoxides Open
Herein, we introduce a visible-light promoted green, metal-free method for the regioselective nucleophilic ring opening of epoxides by exploiting arylazo sulfones as PhotoAcid Generators (PAGs).