1033002-90-2Relevant academic research and scientific papers
Synthesis and characterization of new divalent lanthanide complexes supported by amine bis(phenolate) ligands and their applications in the ring opening polymerization of cyclic esters
Dugah, Divine T.,Skelton, Brian W.,Delbridge, Ewan E.
, p. 1436 - 1445 (2009)
Treatment of an array of bis(phenol)s H2Lx {L x = [(-OC6H2(2,4-R)(6-CH 2))2 NCH2CH2X], where X = CH 2NMe2, NMe2,
Accelerated syntheses of amine-bis(phenol) ligands in polyethylene glycol or "on water" under microwave irradiation
Kerton, Francesca M.,Holloway, Stacey,Power, Angela,Soper, R. Graeme,Sheridan, Kristina,Lynam, Jason M.,Whitwood, Adrian C.,Willans, Charlotte E.
, p. 435 - 443 (2008/09/20)
Pure amine-bis(phenol) ligands are readily accessible in high yield, often >90%, when the Mannich condensation reactions are performed "on water" or in poly(ethyleneglycol) (PEG). Microwave-assisted synthesis dramatically reduces the time and energy required to prepare these molecules, typically from 24 h to 5 min. The approach seems to be widely applicable (7 amines and 5 phenols were tested to yield a diverse set of bis(phenol) ligands). Significant improvements in yield were observed for ligands derived from di-tert-amyl and di-tert-butyl phenols, possibly resulting from a hydrophobic effect. Single crystal X-ray diffraction data for the ligand derived from p-cresol and N,N-dimethylethylenediamine is reported.
