Synthesis and differential functionalisation of pyrrolidine and piperidine based spirodiamine scaffolds
作者:Kamil Weinberg、Axel Stoit、Chris G. Kruse、Mairi F. Haddow、Timothy Gallagher
DOI:10.1016/j.tet.2013.03.064
日期:2013.6
The synthesis and differential substitution/protection of a series of spirodiamine scaffolds are described. Methods for selective access to the two mono-N-methyl isomers based on 2,7-diazaspiro[4.5]decane are also described. Key precursors associated with this chemistry are prone to rearrangement and methods for circumventing this issue are reported. While direct mono-carbamoylation (Boc) was not efficient