The Rh2(OAc)4-catalyzed reactions of 3-trifluoromethyl-4-diazopyrazolinones with aromatic compounds

Rhodium-catalyzed cyclization of acceptor-substituted biphenyl α-diazoketones: a study of the substitution effect on chemoselectivity

A range of biphenyl α-diazoketones containing different α-electron withdrawing groups exhibits divergent chemoselectivity toward rhodium(ii) catalysis, delivering phenanthrols, benz[α]azulenones, aromatic ketones and/or 1,2-diketones in varying ratios.

Selective Functionalization of Aromatic C(sp2 )-H Bonds in the Presence of Benzylic C(sp3 )-H Bonds by Electron-Deficient Carbenoids Generated from 4-Acyl-1-Sulfonyl-1,2,3-Triazoles

A rhodium(II)-catalyzed reaction of newly prepared 4-acyl-1-sulfonyl-1,2,3-triazoles with benzene, and its derivatives, is investigated. Acceptor/acceptor carbenoids generated from 4-acyltriazoles undergo selective insertion at aromatic C(sp² )-H bonds in the presence of benzylic C(sp³ )-H bonds to produce N-sulfonylenaminones.

Catalytic functionalization of low reactive C(sp(3))-H and C(sp(2))-H bonds of alkanes and arenes by carbene transfer from diazo compounds

The direct functionalization of low reactive C(sp(3))-H and C(sp(2))-H bonds of alkanes and arenes, respectively, by metal-induced carbene transfer from diazo compounds is reviewed. To date, this methodology has enabled the incorporation of CR(1)R(2) moieties from N2[double bond, length as m-dash]CR(1)R(2) in a chemo, regio, enantio or diastereoselective manner in those substrates with the appropriate selection of metal and ligands.