Osmium-Catalyzed Vicinal Oxyamination of Alkenes by <i>N</i>-(4-Toluenesulfonyloxy)carbamates
作者:Masruri、Anthony C. Willis、Malcolm D. McLeod
DOI:10.1021/jo301372y
日期:2012.10.5
N-(4-Toluenesulfonyloxy)carbamates based on a range of common amine protecting groups serve as preformed nitrogen sources in the intermolecular osmium-catalyzedoxyamination reaction of a variety of mono-, di-, and trisubstituted alkenes. The reactions occur with low catalyst loadings and good yields and afford high regioselectivity for unsymmetrically substituted alkenes.
Aminohydroxylation of olefins with iminopyridinium ylides by dual Ir photocatalysis and Sc(OTf)3 catalysis
作者:Kazuki Miyazawa、Takashi Koike、Munetaka Akita
DOI:10.1016/j.tet.2016.05.045
日期:2016.12
We have developed a new strategy for catalytic aminohydroxylation of olefins with an N-protected iminopyridinium ylide as the amine source. Iminopyridinium ylides N-protected with TFAc (trifluoroacetyl), Boc (tert-butoxycarbonyl), Troc (2,2,2-trichloroethoxycarbonyl), and Alloc (allyloxycarbonyl) groups serve as N-centered radical precursors when combined with fac-[Ir(ppy)3] photocatalysis and Sc(OTf)3