F. Iradier et al., Synthesis of medium-sized cyclic amines by selective ring cleavage of sulfonylated bicyclic amines, ORG LETT, 3(19), 2001, pp. 2957-2960
[GRAPHICS]
An efficient method of synthesis of functionalized medium-sized cyclic amin
es (eight- to ten-membered rings) by selective ring opening of sulfonylated
bicyclic pyrrolizidine, indolizidine, and quinolizidine compounds is descr
ibed. The key step is the selective cleavage of the central C-N bond of the
bicyclic amine by means of a Julia-like desulfonylation process.