A benzene-bridged divanadium complex-early transition metal catalyst for alkene alkylarylation with PhI(O₂CR)₂via decarboxylation

Abstract

The synthesis, structure and catalytic activity of benzene-bridged divanadium complex were comprehensively studied. Reduction of (Nacnac)VCl2 (1) (Nacnac = (2,6-iPr2C6H3NCMe)2HC) supported by β-diketiminate with potassium graphite (KC8) by employing benzene...

Inverse Sandwich Arene-Bridged Titanium Complexes Supported by a Bulky Tridentate [O, P, O] Ligand

“…Complex 4 exhibited very close dihedral angle (16.830°) and C–C bond distances (1.403(4)–1.439(4) Å) to those of complex 3 . It should be noted that similar low-valent metals with inverse sandwich-type structures have also been reported by others. − For instance, Huang and Diaconescu reported a series of arene-bridged dithorium complexes, indicating a planar 10π-electron aromatic bridged ring. , Several tetra-anionic arene lanthanide complexes with planar aromatic structures were investigated by Liddle, , Mazzanti, and Arnold . By contrast, the toluene and benzene units in our complexes 3 and 4 were distorted and only had weak aromaticity.…”

Strategies and Mechanisms of First-Row Transition Metal-Regulated Radical C–H Functionalization

“…145−147 In 2021, Zhang and co-workers disclosed a novel radical C(sp 2 )−H alkylation catalyzed by a benzene-bridged inverted-sandwich divanadium complex [L 10-1 V(I)] (Scheme 10a). 148 In this process, a SET between a cyclohexadienyl radical and the [V(II)] complex was used to promote oxidative aromatization. TEMPO was added to the reaction between N-acrylamide (10-4) and 10-2 as a radical scavenger.…”

NaI/PPh3-catalyzed visible-light-mediated decarboxylative radical cascade cyclization of N-arylacrylamides for the efficient synthesis of quaternary oxindoles

“…These are broadly found in natural products, pharmaceuticals, and bioactive molecules (Figure 1) [7][8][9][10][11][12][13]. Although a number of synthetic approaches have already been explored [14][15][16][17][18][19][20], these existing methods generally require stoi-chiometric, often onerous reagents [21][22][23][24][25][26][27][28], and/or high temperatures [29][30][31][32][33][34][35][36][37][38].…”