Photocatalysis for the Formation of the C−C Bond

A Lewis Base Catalysis Approach for the Photoredox Activation of Boronic Acids and Esters

“…They are particularly attractive in the context of C−C bond‐forming reactions,2 overcoming problems often associated with two‐electron processes 3. By enabling visible‐light‐promoted single electron transfer, photoredox catalysis has become a method of choice for the single‐electron reduction or oxidation of organic substrates and allows to generate open‐shell intermediates in a mild and selective fashion 4.…”

Allene formation by gold catalyzed cross-coupling of masked carbenes and vinylidenes

“…Among them are reactions that directly couple two different sp 2 -hybridized carbon centers to form an olefin (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13). Conceptually, the simplest process would be the dimerization and cross-coupling of two free carbenes (Fig.…”

Visible light induced Knoevenagel condensation: A clean and efficient protocol using aqueous fruit extract of tamarindus indica as catalyst

“…An attractive area in organic synthesis involves photochemical reactions particularly using visible light in environmentfriendly solvent like water or aqueous ethanol and is generally considered as a clean and green procedure. This type of photo-activation of substrate very often minimizing the formation of byproducts and requires much lesser time corresponds to thermal methods and for this reason, photochemical reactions occupy an interesting position and excellent reviews/paper have been published [35][36][37][38][39][40]. The use of water as a reaction medium is not only inexpensive and environmentally benign but also provides completely different reactivity [41].…”