192711-31-2Relevant academic research and scientific papers
Molybdenum-catalyzed olefin epoxidation: Ligand effects
Thiel, Werner R.,Eppinger, Joerg
, p. 696 - 705 (1997)
We synthesized substituted pyrazolylpyridine ligands to examine their donor properties by spectroscopic (IR, NMR) and computational (AM 1) methods. The influence of the substitution patterns on spectroscopic and thermodynamic features of molybdenum oxobis
Regioselective formation of N-alkyl-3,5-pyrazole derived ligands. A synthetic and computational study
Montoya, Vanessa,Pons, Josefina,Branchadell, Vicen?,Ros, Josep
, p. 12377 - 12385 (2007/10/03)
New N-alkyl-3,5-pyrazole derived ligands were synthesized by reaction between 3,5-pyrazole derived ligands and the appropriate haloalkane in toluene or THF using NaOEt or NaH as base. When the precursor ligand bears a pyridyl substituent the alkylation reaction presents a large regioselectivity. Theoretical calculations have been carried out to rationalize the experimental observations. It has been shown that regioselectivity is governed by the formation of Na+-pyrazolide chelate complexes.
