Synthesis of 4-substituted nipecotic acid derivatives and their evaluation as potential GABA uptake inhibitors
作者:Tim Hellenbrand、Georg Höfner、Thomas Wein、Klaus T. Wanner
DOI:10.1016/j.bmc.2016.03.038
日期:2016.5
acid as it is the case for N-substituted derivatives this is expected to lead to highly potent binders. For the synthesis of novel 4-substituted nipecotic acid derivatives a linear synthetic strategy was employed. As a key step, palladium catalyzed cross coupling reactions were used to attach the required biaryl moieties to the omega-position of the alkenyl- or alkynyl spacers of varying length in the
Conjugate Addition of Organomagnesium Cuprates to Guvacine Derivatives
作者:Tim Hellenbrand、Klaus T. Wanner
DOI:10.1002/ejoc.201402259
日期:2014.7
The synthesis of 4-substituted piperidine-3-carboxylates was achieved by conjugateaddition of organomagnesium cuprates to N-methyl and N-tert-butoxycarbonyl guvacine derivatives. Good to excellent yields were obtained with primary Grignard reagents containing alkyl, alkenyl, alkynyl, or masked aldehyde groups in a copper(I)-trimethylsilylacetylide-catalysed and chlorotrimethylsilane (TMSCl) mediated