Iterative Multifunctionalization of Unactivated C−H Bonds in Piperidines by Way of Intramolecular Rh(II)-Catalyzed Aminations
作者:Sylvestre Toumieux、Philippe Compain、Olivier R. Martin
DOI:10.1021/jo702350u
日期:2008.3.1
Efficient stereocontrolled synthesis of di-, tri-, tetra-, and pentasubstituted piperidines from simple 2-sulfamoyloxymethyl piperidine derivatives has been performed by way of intramolecular Rh-catalyzed amination of saturated C-H bonds. In this process, the sulfamoyloxymethyl arm was directly or indirectly involved in the functionalization of every saturated methylene group of the piperidine ring at C-3, C-4, C-5, and C-6. Direct application to the total synthesis of iminosugars and related compounds demonstrated the synthetic potential of this strategy.
New Aspects of Catalytic Intramolecular C−H Amination: Unexpected Formation of a Seven-Membered Ring in Nitrogen-Containing Systems
作者:Sylvestre Toumieux、Philippe Compain、Olivier R. Martin、Mohamed Selkti
DOI:10.1021/ol061649x
日期:2006.9.1
The first example of the formation of a seven-memberedring by way of intramolecular-catalyzed amination of saturated C-H bonds is reported (Du Bois reaction). The influence of various structural parameters was studied, and it was shown that the unexpected regioselectivity observed in nitrogen-containing systems could be rationalized by conformational factors. These results open the way to innovative