The synthesis and kinetic cyclisations of a series of linear quinine oligomers are described. The distribution of cyclic oligomers is different from that observed in the corresponding thermodynamic cyclisation: cyclic tetramer is observed in the kinetic cyclisations, indicating that its absence under thermodynamic conditions is not due to any kinetic barrier to its formation.
Rowan, S. J., Brady, P. A., & Sanders, J. K. M. (1996). Synthesis and kinetic cyclisation of quinine-derived oligomers. Tetrahedron Letters, 37(33), 6013–6016. https://doi.org/10.1016/0040-4039(96)01263-4