Scavenging of fluorinated N,N'-dialkylureas by hydrogen binding: a novel separation method for fluorous synthesis.
Org Lett 2001;
3:2361-4. [PMID:
11463316 DOI:
10.1021/ol016165+]
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Abstract
[reaction: see text] A dramatic solubility increase in fluorous solvents is observed for N,N'-di(polyfluoroalkyl)ureas when hydrogen binding complexes are formed with commercially available perfluoroalkanoic acid scavengers. As a case example, analytically pure peptides and esters are obtained using this novel separation method.
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