Conversion of aryl azides to O-alkyl imidates via modified Staudinger ligation.
[reaction: see text] o-Carboalkoxy triarylphosphines are shown to react with aryl azides to provide Staudinger ligation products bearing O-alkyl imidate linkages. This is in contrast to alkyl azides whose ligation to o-carboalkoxy triarylphosphines has been reported to yield amide-linked materials. This extension of the Staudinger ligation for coupling of abiotic reagents under biocompatible conditions highlights the utility of commercially available triarylphosphines through which suitable linkers can be attached via an ester moiety.
The School of Pharmacy and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, USA.
José A
JA
Restituyo
Lindsay R
LR
Comstock
Scott G
SG
Petersen
Thomas
T
Stringfellow
Scott R
SR
Rajski