2 research outputs found
N‑Heterocyclic-Carbene Complexes Readily Prepared from Di-μ-hydroxopalladacycles Catalyze the Suzuki Arylation of 9‑Bromophenanthrene
New cyclometalated palladium complexes
of general formula [Pd(Bmim)(X)(C<sup>∧</sup>N)] have been
synthesized by a novel reaction route
involving di-μ-hydroxo-palladacycles [{Pd(μ-OH)(C<sup>∧</sup>N)}<sub>2</sub>] (C<sup>∧</sup>N = 2-benzoylpyridine
(Bzpy), <b>I</b>, previously unreported, or C<sup>∧</sup>N = 2-phenylpyridine (Phpy), <b>II</b>)] and 1,3-butylmethylimidazolium
salts [HBmim]X (X: Cl, Br, I, or saccharinate (Sacc); <b>a</b>, <b>b</b>, <b>c</b>, or <b>d</b> complexes, respectively).
This simple acid–base reaction could not be achieved under
identical conditions when corresponding di-μ-acetate complexes
were used as starting materials. An alternative pathway to NHC/imidate
complexes has also been explored by reacting <b>IIb</b> with
[Ag(Phthal)(SMe<sub>2</sub>)]<sub>2</sub> (Phthal = phthalimidate, <b>e</b>) to obtain [Pd(Bmim)(Phthal)(Phpy)], <b>IIe</b>. Structural
characterization by X-ray diffraction of complexes <b>Id</b>, <b>IIb</b>, <b>IId</b>, and <b>IIe</b> has confirmed
the proposed formulas. The mononuclear complexes have shown to catalyze
the scalable Suzuki–Miyaura cross-coupling of 9-bromophenanthrene
with a wide scope of aryl boronic acids, irrespective of their electronic
properties and at a very low catalyst concentration of 0.01%
N‑Heterocyclic-Carbene Complexes Readily Prepared from Di-μ-hydroxopalladacycles Catalyze the Suzuki Arylation of 9‑Bromophenanthrene
New cyclometalated palladium complexes
of general formula [Pd(Bmim)(X)(C<sup>∧</sup>N)] have been
synthesized by a novel reaction route
involving di-μ-hydroxo-palladacycles [{Pd(μ-OH)(C<sup>∧</sup>N)}<sub>2</sub>] (C<sup>∧</sup>N = 2-benzoylpyridine
(Bzpy), <b>I</b>, previously unreported, or C<sup>∧</sup>N = 2-phenylpyridine (Phpy), <b>II</b>)] and 1,3-butylmethylimidazolium
salts [HBmim]X (X: Cl, Br, I, or saccharinate (Sacc); <b>a</b>, <b>b</b>, <b>c</b>, or <b>d</b> complexes, respectively).
This simple acid–base reaction could not be achieved under
identical conditions when corresponding di-μ-acetate complexes
were used as starting materials. An alternative pathway to NHC/imidate
complexes has also been explored by reacting <b>IIb</b> with
[Ag(Phthal)(SMe<sub>2</sub>)]<sub>2</sub> (Phthal = phthalimidate, <b>e</b>) to obtain [Pd(Bmim)(Phthal)(Phpy)], <b>IIe</b>. Structural
characterization by X-ray diffraction of complexes <b>Id</b>, <b>IIb</b>, <b>IId</b>, and <b>IIe</b> has confirmed
the proposed formulas. The mononuclear complexes have shown to catalyze
the scalable Suzuki–Miyaura cross-coupling of 9-bromophenanthrene
with a wide scope of aryl boronic acids, irrespective of their electronic
properties and at a very low catalyst concentration of 0.01%