Visible Light Induced Oxidation of α-Diazo Esters for the Transition Metal-Free Synthesis of α-Keto Esters

Abstract

( a 江西师范大学化学化工学院 南昌 330022)

Magnetic MoS2 efficient heterogeneous photocatalyst for the α-methoxymethylation and aminomethylation of aromatic ketones

“…In this context, visible light-mediated organic transformation has emerged as a powerful and one of the fastest-growing fields in organic synthesis through using low-cost, safe, abundant, clean, and renewable light sources. 1–5 However, homogeneous photoredox catalysts, such as Ru and Ir complexes or organic dyes, are usually used as photosensitizers for photocatalytic conversion since most organic compounds do not absorb visible light. 6–8 These homogeneous catalysts are not recyclable, which not only leads to waste but also increases the production costs, resulting in environmental problems and the need for tedious purification procedures.…”

Rapid One‐Pot Aerobic Oxidative N‐α‐C(sp3)‐H Functionalization of Arylmethylamines to Access Tetrasubstituted Imidazoles

“…Hence, the development of catalytic system under molecular oxygen or air as oxidant has been an increasing attention in the aerobic oxidation reactions development. [42][43][44][45][46][47][48][49][50] Traditionally, the Debus-Radziszewski imidazole synthesis meth-od is used to synthesize imidazoles by the carbonyl compounds and ammonium salts condensation. The different synthetic methods have been reported for preparation of trisubstituted imidazoles from isocyanides, nitriles, amino acids, imines, amides, and amidines substrates.…”

HOAc catalyzed three-component reaction for the synthesis of 3,3′-(arylmethylene)bis(1H-indoles)

“…In recent years, this strategy has been applied to a variety of chemical transformations. 23 Herein, we report an intramolecular cyclization of o -alkynyl aromatic amines and cascade condensation with aryl aldehydes to access 3,3′-(arylmethylene)bis(1 H -indoles) via a transition-metal-free one-pot procedure with cheap HOAc as a catalyst.…”