Synthesis and molecular structure of new O/N/O ligands: Bis-phenol-pyridine and bis-phenol-pyrazole

Dimethylformamide dimethyl acetal as a building block in heterocyclic synthesis

“…The reaction of enaminones (177a-j) with different nucleophiles afforded different heterocycles. Reaction of enaminone (177a) with 2-methoxyacetophenone September 2009 815 Dimethylformamide Dimethyl Acetal in Heterocyclic Synthesis (176a) in the presence of potassium t-butoxide afforded pyridine derivative (178) [124]. The treatment of the dimethylaminopropenone (177b) with cyanoacetamide afforded pyridine-2(1H)-one (179) [125].…”

Cyclometalated group 4 complexes supported by tridentate pyridine-2-phenolate-6-(σ-aryl) ligands: Catalysts for ethylene polymerization and comparisons with fluorinated analogues

“…The 2-(2 0 -phenol)-6-arylpyridine ligands were prepared by significant modification of a literature synthesis for 2,6-bis(2 0 -phenol)pyridine [18]. The 1-N,N-dimethylamino-3-(substituted aryl)-3-oxo-1-propenes were prepared from the reactions of N,N-dimethylformamide dimethyl acetal with acetophenones bearing functional groups at the R 1 / R 2 or R 1 /R 3 positions (Scheme 1).…”

Aryl and 1,3-dioxoindanyl derivatives of azoles and azines (review)

“…The presence of an intramolecular hydrogen bond between the proton of the hydroxyl group and the nitrogen atom of the pyridine was detected by NMR spectroscopy and X-ray crystallography, and the dependence of its characteristics on the structural features of the pyridines 10 (A = CH, R 2 = OH) was investigated [22,[68][69][70][71].…”