Mixed er-NHC/phosphine Pd(ii) complexes and their catalytic activity in the Buchwald–Hartwig reaction under solvent-free conditions

Abstract

A single catalyst for solvent-free Buchwald–Hartwig amination with both primary and secondary amines.

Mild deprotection of the N-tert-butyloxycarbonyl (N-Boc) group using oxalyl chloride

“…The spectral data of the compound 10b was consistent with the values reported in the literature. 59 tert-Butyl N-(N-(4-thiophene-phenyl)piperazine)carbamate (entry 11a). Prepared according to general N-Boc procedure.…”

Arsenic‐Bridged Silafluorene and Germafluorene as a Novel Class of Mixed‐Heteroatom‐Bridged Heterofluorenes

“…We are now extensively investigating the effect of the arsenic atom on phosphorescence as well as the development of other arsenic-bridged heterofluorenes, and the results will be reported in future publications. [19] 2,2',6,6'-tetrabromobiphenyl (1) [12] and 9phenyl-9-arsafluorene (4), [3a] and hexaphenylhexaarsine (As 6 Ph 6 ) [20] were prepared according to literature procedures.…”

“…All commercially available chemicals were used without further purification. 2,2’‐Dibromobiphenyl, [19] 2,2’,6,6’‐tetrabromobiphenyl ( 1 ) [12] and 9‐phenyl‐9‐arsafluorene ( 4 ), [3a] and hexaphenylhexaarsine (As 6 Ph 6 ) [20] were prepared according to literature procedures.…”

Design Concepts for N-Heterocyclic Carbene Ligands

“…ReNHC ligands have found applications across organometallic chemistry and catalysis, including as ligands for gold catalysts [64,69], ruthenium alkene metathesis catalysts [70][71][72], copper catalysts for azide-alkyne cycloaddition reactions [63,73] and alkyne semihydrogenation [74], palladium cross-coupling catalysts [75], and platinum catalysts for alkene diboration [76].…”