Rearrangement of Differentially Protected<i>N</i>-Arylhydroxylamines
作者:Achim Porzelle、Michael D. Woodrow、Nicholas C. O. Tomkinson
DOI:10.1002/ejoc.200800672
日期:2008.10
The rearrangement of a series of N,O-difunctionalized N-arylhydroxylamines to generate protected 2-aminophenols has been investigated. N-Boc-N-aryl-O-acylhydroxylamines are stable, isolable compds. which rearrange smoothly at temps. between 110 and 140°C. The corresponding N-Boc-N-aryl-O-sulfonylhydroxylamines were not isolated and rearrange to 1,2-difunctionalized aminophenols at room temp. in excellent
Regioselective installation of fluorosulfate (–OSO<sub>2</sub>F) functionality into aromatic C(sp<sup>2</sup>)–H bonds for the construction of <i>para</i>-amino-arylfluorosulfates
fluorosulfate (–OSO2F) functionality into aromatic C(sp2)–H bonds by the reaction of N-arylhydroxylamine with sulfuryl fluoride (SO2F2). This method provides a mild process for the preparation of broadly applicable fluorosulfate moieties without the requirement of phenols or transitionmetals.