Intramolecular cyclization of alkylhydroxylamines in acids.

~%

~%

~%

~95%

~%

~%

~%

~87%

~%

~91%

~%

~%

~58%

~8%

~77%

~%

~%

~%

~%

~58%

~47%

~24%

~62%

~56%