872060-34-9Relevant academic research and scientific papers
Synthesis, characterisation and crystal structure of a novel pyridyl urea Macrocycle
Areej, M. Al-Taweel,Perveen, Shagufta,Kilburn, Jeremy D.,Light, Mark E.
, p. 753 - 757 (2016/12/30)
A novel pyridyl urea based macrocycle has been synthesised and fully characterised including a single crystal X-ray structure determination. The synthetic approach first involves the reaction of benzyloxycarbonylaminopropyl-3-isocyanate with t-butyl 2-[(2-Aminopyridin-3- yl)oxy]acetate resulting in a coupling product. After deprotection of the amine and acid moieties and coupling subsequent coupling in the presence of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC), a macrocycle is formed. The structures of the compounds were confirmed by mass spectrometry and NMR spectroscopy. The X-ray crystal structure of the macrocycle reveals as expected a non-binding conformation with an intramolecular hydrogen bond between the urea NH and the pyridyl nitrogen.
BIFUNCTIONAL DERIVATIVES OF POLYETHYLENE GLYCOL, THEIR PREPARATION AND USE
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Page/Page column 8; 9, (2010/02/15)
The patent describes homo- or hetero-bifunctional derivatives of polyethylene glycol (PEG) obtained by selectively modifying the hydroxyl end groups of commercial PEGs of different molecular weights with reactive bifunctional molecules. The synthesis proc
