Chemoselective formation of C–N bond in wet acetonitrile using amberlyst^®-15(H) as a recyclable catalyst

Cu(OAc)2 catalysed aerobic oxidation of aldehydes to nitriles under ligand-free conditions

“…Therefore, development of highly efficient strategy 11 avoiding the use of toxic and expensive metal catalysts and utilizing the less hazardous and inexpensive reagents for the synthesis of nitriles is of great demand in the perspective of present environmental scenario. Of late, copper-catalyzed 12 organic transformations has drawn tremendous interest because copper and its compounds are considerably more abundant, less toxic, cheaper in price and environmentally benign compared to other existing precious metal-based catalysts.…”

The serendipitous effect of KF in Ritter reaction: Photo-induced amino-alkylation of alkenes

“…This two-component protocol usually involves the generation of carbocation intermediates from tertiary, secondary, and benzylic alcohols under acidic conditions ( Kürti and Czakó, 2005 ). As basic feedstock chemicals, simple alkenes have also been widely used as carbocation precursors in Ritter reaction ( Eren and Kusefoglu, 2005 ; Huang et al., 2012 ; Jiang and Studer, 2020 ; Nandy et al., 2020 ; Park et al., 2018 ; Shi et al., 2015 ; Subba Reddy et al., 2010 ; Welniak, 1996 ; Williams et al., 2017 ; Xu et al., 2017 ; Yang et al., 2018 ; Yasuda and Obora, 2015 ; Zhang et al., 2020 ). Of particular interest is the three-component Ritter reaction, which can efficiently incorporate two distinct functional groups onto the carbon-carbon double bonds in one-step ( Abe et al., 2010 , 2017 ; Ahmed et al., 2020 ; Ai et al., 2015 ; Bao et al., 2019 ; Chen et al., 2016 ; Feng et al., 2018 ; Liu and Klussmann, 2020 ; Qian et al., 2017 ; Zhu et al., 2017 ).…”

Chemoselective and ligand‐free aerobic oxidation of benzylic alcohols to carbonyl compounds using alumina‐supported mesoporous nickel nanoparticle as an efficient recyclable heterogeneous catalyst

“…Moreover, these processes usually employed a large amount of environmentally ill‐disposed heavy‐metal waste that is undesirable from the standpoint of green and sustainable chemistry. Therefore, organic reactions using heterogeneous catalysts [ 17,18 ] have received substantial interest due to their operational simplicity, better selectivity, cost‐effectiveness as well as recyclability compared with the traditional homogeneous counterparts. Heterogeneous systems involving complexes of various transition metals, like Fe 3 O 4 @SiO 2 ‐APTES‐FeL/TBHP/O 2 , [ 19 ] Ni (II)riboflavin complex/H 2 O 2 , [ 20 ] Pd‐PdO@rGO/O 2 , [ 21 ] Pt@Ca‐ZSM‐5/aerial oxygen, [ 22 ] RuO 2 ‐Supported Mn 3 O 4 /air, [ 23 ] binuclear Rh (II)complex/O 2 , [ 24 ] Au@CeO 2 /O 2, [ 25 ] V 2 O 5 @GO/O 2, [ 26 ] and Mo (VI)@Merrifield resin/H 2 O 2 , [ 27 ] have been also documented in recent years.…”