C bond in 9-alkylidene-fluorenes
Iron-catalyzed quaternary peroxidation of 9-alkyl-9H-fluorenes involving a radical mechanism was effectively performed. Oxidation of 9H-fluorenes to 9-fluorenones and oxidative C
C bond cleavage in 9-alkylidene-fluorenes were also performed.
The bio-inspired bis-azopyridyl copper(I) complex, [2] efficiently catalyzes sp3 C–H alkylation of fluorenes using alcohols under mild conditions with broad substrate scope and excellent functional group tolerance via ligand reductions.
An efficient synthetic route to functionalized benzo[b]fluorenes and benza[a]anthracenes has been developed via triflic acid mediated tandem isomerization/cyclodehydration of formyl bearing 1-benzylidene-2,3-dihydroindene/1-benzylidene-tetrahydronaphthalene derivatives.
Functionalized fluorenones/fluorenes are generally synthesized via cross-coupling reactions. Described here is the modification of the fluorene/fluorenone core via a C–H functionalization tactic and augmentation of the fluorenes/fluorenones library.
This manuscript describes a triazolyl-pyridine nickel pincer complex that catalyzes C-alkylation of fluorenes and enables bisindolylmethane synthesis from alcohols under mild conditions with low catalyst use, broad scope, and high selectivity.