1,4-Bis(bromomethyl)-2,3,5,6-tetramethylbenzene
23 (link) and
N-R-benzimidazole
24 (link) were prepared according to the methods in literature.
The solvents were purified according to the standard procedures, and
Schlenk techniques were used in all manipulations. All commercially
available chemicals in the experiments were of reagent grade and used
as received. A Boetius Block apparatus was used to determine the melting
points of products. A Varian
Mercury Vx 400 spectrometer was used
to record
1H and
13C NMR spectra at 400 and
100 MHz, respectively. Chemical shifts, δ, were reported in
parts per million (ppm) for both
1H and
13C
NMR. Coupling constant (
J) values were given in hertz
(Hz). The elemental analyses were carried out on a PerkinElmer 2400C
Elemental Analyzer. A Focus DSQI GC–MS was used, which was
equipped with an integrator (C-R8A) with a capillary column (CBP-1
or CBP-5, 0.25 mm i.d. × 40 m).
Liu Q.X., Hu Z.L., Yu S.C., Zhao Z.X., Wei D.C, & Li H.L. (2018). NHC Pd(II) and Ag(I) Complexes: Synthesis, Structure, and Catalytic Activity in Three Types of C–C Coupling Reactions. ACS Omega, 3(4), 4035-4047.